S.I. No. 424/2001 - Merchant Shipping (Load Line) Rules, 2001

• (3)
• (a) In the case of an enclosed superstructure of standard height, the effective length of a superstructure (E) shall be, subject to subparagraph (c) below, either -

• (i) its length; or

• (ii) if the superstructure is set in from the sides of the ship, its length modified in the ratio b/Bs, where -

• (aa) “b” is the breadth of the superstructure at the middle of its length; and

• (bb) “Bs” is the breadth of the ship at the middle of the length of the superstructure:

where the superstructure is only set in for part of its length, this modification shall be applied only to that part.

• (b) In the case of an enclosed superstructure of less than standard height the effective length of a superstructure, subject to subparagraphs (a) above and (c) below, shall be its length reduced in the ratio of the actual height of the superstructure to its standard height.

• (c) In the case of an enclosed superstructure consisting of a raised quarter deck the effective length of a superstructure shall, if the deck is fitted with an intact front bulkhead, be its length subject to a maximum of 0.6 of the ship's length and, if not so fitted, be determined by treating the raised quarter deck as a poop of less than standard height.

• (d) A superstructure which is not an enclosed superstructure as defined in paragraph 1 of Schedule 2 shall have no effective length.

Standard height and effective length of trunks

10. (1) The standard height of a trunk shall be that applicable to a superstructure other than a raised quarter deck in paragraph 9(1).

• (2) The effective length of a trunk shall be determined as follows -

• (a) a trunk which is not an efficient trunk as described in subparagraph (b) below shall have no effective length;

• (b) a trunk shall be treated as an efficient trunk provided -

• (i) it is at least as strong as a superstructure;

• (ii) the hatchways in way of the trunk are in the trunk deck, and the hatchway coamings and covers comply with the requirements of paragraphs 4 to 6 of Schedule 2, except that small access openings with watertight covers may be permitted in the freeboard deck;

• (iii) the width of the trunk deck stringer provides a satisfactory gangway and sufficient lateral stiffness;

• (iv) a permanent working platform fore and aft fitted with guard rails or guard wires complying with applicable requirements in paragraph 18(2)(a) of Schedule 2 is provided by the trunk deck, or by detached trunks connected to superstructures by efficient permanent gangways.

• (v) ventilators are protected by the trunk, by watertight covers or by equivalent means;

• (vi) open rails or wires are fitted on the weather parts of the freeboard deck in way of the trunk for at least half of their length;

• (vii) the machinery casings are protected by the trunk, or by an enclosed superstructure of at east standard height, or by a deckhouse of the same height, strength and weathertightness equivalent to such an enclosed superstructure;

• (vii) the breadth of the trunk is at least 60 per cent of the breadth of the ship;

• (ix) where there is no superstructure the length of the trunk is at least 0.6(L).

• (c) Except as otherwise provided in subparagraph (d) below, the effective length of an efficient trunk shall be its full length reduced in the ratio of its mean breadth to the breadth of the ship.

• (d) If the actual height of an efficient trunk is less than the standard height, its effective length shall be the length calculated in accordance with subparagraph (c) above reduced in the ratio of the actual to the standard height of the trunk. In addition, if the ship is a Type “B” ship and the height of hatchway coamings on the trunk deck is less than that required by paragraph 5(1) or 6(1) of Schedule 2 a reduction from the actual height of the trunk shall be made of an amount corresponding to the difference between the actual height and the required height of the hatchway coamings.

Deduction for effective length of superstructures and trunks

11. (1) Where the sum of the effective lengths of superstructures and trunks of a ship is 1.0(L), the basic freeboard of the ship shall be reduced by -

350 millimetres	if the ship is 24 metres in length (L);
860 millimetres	if the ship is 85 metres in length (L);
1070 millimetres	if the ship is 122 metres in length (L) or more;

and by amounts obtained by linear interpolation in the case of ships of intermediate length.

• (2) Where the sum of the effective lengths of superstructures and trunks is less than 1.0 (L), the basic freeboard of a ship shall be reduced by a percentage of the figures in subparagraph (1) according to the total effective length of its superstructures and trunks as follows:

• (a) In the case of a Type “A” ship, by a percentage given in Table 3. The percentage in the case of a ship having superstructures and trunks of an effective length intermediate to those specified in Table 3 is to be obtained by linear interpolation.

• (b) (i) Subject to subparagraphs (ii), (iii) and (iv) below, in the case of a Type “B” ship, by a percentage given in Table 4. The percentage in the case of a ship having superstructures and trunks of an effective length intermediate to those specified in Table 4 is to be obtained by linear interpolation.

• (ii) Where the effective length of a bridge covers less than 0.1 (L) before and 0.1(L) abaft amidships the percentages shall be obtained by linear interpolation between the lines 1 and II.

• (iii) Where the effective length of a forecastle is more than 0.4 (L), the percentage shall be obtained from line II.

• (iv) Where the effective length of a forecastle is less than 0.07 (L), the above percentages shall be reduced by -

	5.	(0.07) (L) - f)
		0.07(L)

where “f” is the effective length of the forecastle.

TABLE 3

PERCENTAGE OF DEDUCTION FOR TYPE “A” SHIPS

Percentage of deduction for all types of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks
	0	0.1(L)	0.2(L)	0.3(L)	0.4(L)	0.5(L)	0.6(L)	0.7(L)	0.8(L)	0.9(L)	1.0(L)
	0	7	14	21	31	41	52	63	75.3	87.7	100

TABLE 4

PERCENTAGE OF DEDUCTION FOR TYPE “B” SHIPS

Ships with forecastle and without detached bridge	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks	Total effective length of superstructure and trunks
	Line	0	0.1(L)	0.2(L)	0.3(L)	0.4(L)	0.5(L)	0.6(L)	0.7(L)	0.8(L)	0.9(L)	1.0
	1	0	5	10	15	23.5	32	46	63	75.3	87.7	100
Ships with forecastle and detached bridge	11	0	6.3	12.7	19	27.5	36	46	63	75.3	87.7	100

Measurement of Sheer

12. (1) The sheer shall be measured from the deck at side to a line of reference drawn parallel to the keel through the sheer line at amidships.

• (2) In ships designed with a rake of keel, the sheer shall be measured in relation to a line of reference drawn parallel to the Summer load waterline.

• (3) In flush deck ships and in ships with detached superstructures the sheer shall be measured at the freeboard deck.

• (4) In ships with topsides of unusual form in which there is a step or break in the topsides, the sheer shall be considered in relation to the equivalent depth amidships.

• (5) In ships with a superstructure of standard height which extends over the whole length of the freeboard deck, the sheer shall be measured at the superstructure deck. Where the height of the superstructure exceeds the standard height the least difference (Z) between the actual and standard heights shall be added to each end ordinate. Similarly, the intermediate ordinates at distances of 1/6(L) and 1/3(L) from each perpendicular shall be increased by 0.444 (Z) and 0.111 (Z) respectively.

• (6) Where the deck of an enclosed superstructure has at least the same sheer as the exposed freeboard deck, the sheer of the enclosed portion of the freeboard deck shall not be taken into account.

• (7) Where an enclosed poop or forecastle is either -

• (a) of standard height with greater sheer than that of the freeboard deck; or

• (b) is of more than standard height;

an addition to the sheer of the freeboard deck shall be made calculated in accordance with paragraph 14(4).

Standard sheer profile

13. The ordinates of the standard sheer profile are given in Table 5 -

TABLE 5

	Station	Ordinate	Factor
		(in millimetres)
After Half	After perpendicular (A.P.)	25.0((L)/3+10)	1
	1/6(L) from A.P.	11.1((L)/3+10)	3
	1/3(L) from A.P.	2.8((L)/3+10)	3
	Amidships	0	1
Forward Half	Amidships	0	1
	1/3(L) from F.P.	5.6((L)/3+10)	3
	1/6(L) from F.P.	22.2((L)/3+10)	3
	Forward perpendicular (F.P.)	50.0((L)/3+10)	1

Measurement of variation from standard sheer profile

14. (1) Where the sheer profile differs from the standard sheer profile, the four ordinates of each profile in the forward or after halves of the ship shall be multiplied by the appropriate factors given in paragraph 13. The difference between the sums of the respective products and those of the standard divided by 8 shall be the deficiency or excess of sheer in the forward or other half. The arithmetical mean of the excess or deficiency in the forward and after halves shall be the excess or deficiency of sheer.

• (2) Where the after half of the sheer profile is greater than the standard sheer profile and the forward half is less than the standard sheer profile, no credit shall be allowed for the part in excess, and deficiency only shall be measured.

• (3) Where the forward half of the sheer profile exceeds the standard sheer profile, and the after half of the sheer profile is not less than 75 per cent of the standard sheer profile, credit shall be allowed for the part in excess. Where the after half of the sheer profile is less than 50 per cent of the standard sheer profile, no credit shall be given for the excess of sheer forward. Where the sheer in the after half is between 50 per cent and 75 per cent of the standard sheer profile, intermediate allowances may be granted for excess sheer forward.

• (4) Where sheer credit is given for a poop or forecastle the following formula shall be used -

		y		L'
	S =	3		(L)

where -

S=sheer credit, to be deducted from the deficiency or added to the excess of sheer;

Y=difference between actual and standard height of superstructure at the end ordinate of sheer; and

L'=mean enclosed length of poop or forecastle up to a maximum length of 0.5 (L).

This formula provides a curve in the form of a parabola tangential to the actual sheer curve at the freeboard deck and interacting the end of ordinate at a point below the superstructure deck at a distance equal to the standard height of the poop or forecastle. The superstructure deck shall not be less than standard height above this curve at any point. This curve shall be used in determining the sheer profile for the forward and the after halves of the ship.

Correction for Variations from standard sheer profile

15. (1) The correction for sheer shall be the deficiency or excess of sheer determined in accordance with paragraph 14 multiplied by -

	0.75 -	S
		2(L)

• (2) In the case of a ship with sheer less than the standard sheer profile, the correction for deficiency of sheer determined in accordance with subparagraph (1) shall be added to the basic freeboard of the ship.

• (3) Subject to subparagraph (4), in the case of a ship having an excess of sheer -

• (a) if an enclosed superstructure covers 0.1(L) before and 0.1(L) abaft amidships, the correction for excess of sheer determined in accordance with subparagraph (1) shall be deducted from the basic freeboard of the ship;

• (b) if no enclosed superstructure covers amidships, no deductions shall be made from the basic freeboard of the ship;

• (c) if an enclosed superstructure covers less than 0.1 (L) before and 0.1(L) abaft amidships, the correction for excess of sheer determined in accordance with subparagraph (1) shall be modified in the ratio of the amount of 0.2 (L) amidship which is covered by the superstructure, 0.2(L).

• (4) The maximum deduction for excess sheer shall be at the rate of 125 millimetres per 100 metres of length (L).

Correction for minimum bow height

16. (1) Except as otherwise provided in subparagraph (2) and (3), where the bow height determined in accordance with subparagraph (4) is less than the minimum bow height determined in accordance with subparagraph (5), the freeboard determined for the ship shall be increased by an amount equal to the difference between the bow height and the minimum bow height.

• (2) Where an existing ship to which subparagraph (1) applies has been so constructed or modified as to comply with all the requirements of Schedule 2 applicable to a new ship of her type is to be assigned freeboards determined in accordance with this Schedule, and/or -

• (a) the forecastle is less than 0.07(L);

• (b) the sheer extends for less than 15 per cent of the ship's length (L) measured from the forward perpendicular.

The freeboard shall be increased by such amount as the Assigning Authority may determine in each particular case.

• (3) In the case of a ship to which subparagraph (1) applies, being a ship which is constructed to meet exceptional operational requirements, the correction to be made in accordance with subparagraphs (1) and (2) may be reduced or waived if the Minister is satisfied that the safety of the ship will not be impaired in consequence of the worst sea and weather conditions likely to be encountered by the ship in service.

• (4) The bow height of the a ship is the vertical distance at the forward perpendicular between the Summer load waterline at the designed trim and the top of the exposed deck at side.

• (a) Where the bow height is obtained by including sheer, the sheer shall extend for no less than 15 per cent of length (L) measured from the forward perpendicular.

• (b) Where the bow height is obtained by including the height of a superstructure, such superstructure shall -

• (i) extend from the stem to a point not less than 0.07 of the ship's length (L) measured from the forward perpendicular

• (ii) if length (L) is 100 metres or less, be an enclosed superstructure; and

• (iii) if length (L) exceeds 100 metres in length, be fitted with satisfactory closing appliances.

• (5) The minimum bow height in millimetres shall be -

	56(L)	(1 -	(L)	)	(	1.36	)
		(	500	)	(	Cb + 0.68	)

Where (L) is less than 250 metres, and

	7000	( 1.36 )
		( Cb + 0.68 )

where (L) is 250 metres or more;

Cb shall not be taken as less than 0.68.

PART II - TIMBER FREEBOARDS

Summer Timber freeboard

17. The Summer Timber freeboard is the freeboard determined in accordance with the provisions of paragraphs 5(1), (2)(a), (9) and (10) and corrected in accordance with the provisions of paragraph 6 to 15, except that the percentage in Table 6 shall be substituted for those given in Table 4 of paragraph 11(2).

TABLE 6

PERCENTAGE OF DEDUCTION FOR TYPE “B” SHIPS

Percentage of deduction for all types of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure	Total effective length of superstructure
	0	0.1(L)	0.2(L)	0.3(L)	0.4(L)	0.5(L)	0.6(L)	0.7(L)	0.8(L)	0.9(L)	1.0(L)
	20	31	42	53	64	70	76	82	88	94	100

Percentages at intermediate lengths superstructures shall be obtained by linear interpolation.

Other Timber freeboards

18. (1) The Winter Timber freeboard shall be obtained by adding to the Summer Timber freeboard one thirty-sixth (1/36th) of the Summer Timber draught.

• (2) The Winter North Atlantic Timber freeboard shall be the same as the Winter North Atlantic freeboard assigned.

• (3) The Tropical Timber freeboard shall be obtained by deducting from the Summer Timber freeboard one forty-eighth (1/48th) of the Summer Timber draught.

• (4)
• (a) The Fresh Water Timber freeboard shall, subject to subparagraph (b), be obtained by deducting from the Summer Timber freeboard the quantity -

	▴	millimetres
	4T

where -

▴is the displacement in salt water in tonnes at the waterline which will when load lines have been marked on the ship's side correspond to the Summer Timber load line; and

T represents tonnes per centimetre immersion in salt water at that waterline.

• (b) Where the displacement at that waterline cannot be ascertained the deduction shall be one forty-eighth (1/48th) of the Summer Timber draught of the ship.

PART III - SAILING SHIPS AND OTHER SHIPS

Sailing ships and tugs

19. The freeboards to be assigned to sailing ships and tugs shall be freeboards determined in accordance with the provisions of Part I of this Schedule increased by such amount as the Minister may direct in each particular case.

Ships of wood and other ships

20. The freeboards to be assigned to ships of wood or of composite construction or of other materials, or to ships with constructional features such as to render freeboards calculated in accordance with Part I of this Schedule unreasonable or impracticable shall be determined by the Assigning Authority in each particular case.

Unmanned barges

21. The freeboards to be assigned to unmanned barges having on the freeboard deck only small access openings closed by watertight gasketed covers of steel shall be freeboards determined in accordance with the provisions of Part I of this Schedule omitting paragraphs 5 and 16. Such freeboards may be reduced by such amounts not exceeding 25 per cent as the Minister may direct in each particular case.

SCHEDULE 5

FREEBOARD TABLES

1. The following is the Freeboard Table referred to in paragraph 4 of Schedule 4:-

TABLE A

FREEBOARD TABLE TYPES “A” SHIPS

Length of ship	Freeboard	Length of ship	Freeboard	Length of ship	Freeboard
(metres)	(millimetres)	(metres)	(millimetres)	(metres)	(millimetres)
24	200	64	626	104	1196
25	208	65	639	105	1212
26	217	66	653	106	1228
27	225	67	666	107	1244
28	233	68	680	108	1260
29	242	69	693	109	1276
30	250	70	706	110	1293
31	258	71	720	111	1309
32	267	72	733	112	1326
33	275	73	746	113	1342
34	283	74	760	114	1359
35	292	75	773	115	1376
36	300	76	786	116	1392
37	308	77	800	117	1409
38	316	78	814	118	1426
39	325	79	828	119	1442
40	334	80	841	120	1459
41	344	81	855	121	1476
42	354	82	869	122	1494
43	364	83	883	123	1511
44	374	84	897	124	1528
45	385	85	911	125	1546
46	396	86	926	126	1563
47	408	87	940	127	1580
48	420	88	955	128	1598
49	432	89	969	129	1615
50	443	90	984	130	1632
51	455	91	999	131	1650
52	467	92	1014	132	1667
53	478	93	1029	133	1684
54	490	94	1044	134	1702
55	503	95	1059	135	1719
56	516	96	1074	136	1736
57	530	97	1089	137	1753
58	544	98	1105	138	1770
59	559	99	1120	139	1787
60	573	100	1135	140	1803
61	587	101	1151	141	1820
62	600	102	1166	142	1837
63	613	103	1181	143	1853
144	1870	197	2582	250	3012
145	1886	198	2592	251	3018
146	1903	199	2602	252	3024
147	1919	200	2612	253	3030
148	1935	201	2622	254	3036
149	1952	202	2632	255	3042
150	1968	203	2641	256	3048
151	1984	204	2650	257	3054
152	2000	205	2659	258	3060
153	2016	206	2669	259	3066
154	2032	207	2678	260	3072
155	2048	208	2687	261	3078
156	2064	209	2696	262	3084
157	2080	210	2705	263	3089
158	2096	211	2714	264	3095
159	2111	212	2723	265	3101
160	2126	213	2732	266	3106
161	2141	214	2741	267	3112
162	2155	215	2749	268	3117
163	2169	216	2758	269	3123
164	2184	217	2767	270	3128
165	2198	218	2775	271	3133
166	2212	219	2784	272	3138
167	2226	220	2792	273	3143
168	2240	221	2801	274	3148
169	2254	222	2809	275	3153
170	2268	223	2817	276	3158
171	2281	224	2825	277	3163
172	2294	225	2833	278	3167
173	2307	226	2841	279	3172
174	2320	227	2849	280	3176
175	2332	228	2857	281	3181
176	2345	229	2865	282	3185
177	2357	230	2872	183	3189
178	2369	231	2880	284	3194
179	2381	232	2888	285	3198
180	2393	233	2895	286	3202
181	2405	234	2903	287	3207
182	2416	235	2910	288	3211
183	2428	236	2918	289	3215
184	2440	237	2925	290	3220
185	2451	238	2932	291	3224
186	2463	239	2939	292	3228
187	2474	240	2946	293	3233
188	2486	241	2953	294	3237
189	2497	242	2959	295	3241
190	2508	243	2966	296	3246
191	2519	244	2973	297	3250
192	2530	245	2979	298	3254
193	2541	246	2986	299	3258
194	2552	247	2993	300	3262
195	2562	248	3000	301	3266
196	2572	249	3006	302	3270
303	3274	324	3342	345	3394
304	3278	325	3345	346	3396
305	3281	326	3347	347	3399
306	3285	327	3350	348	3401
307	3288	328	3353	349	3403
308	3292	329	3355	350	3406
309	3295	330	3358	351	3408
310	3298	331	3361	352	3410
311	3302	332	3363	353	3412
312	3305	333	3366	354	3414
313	3308	334	3368	355	3416
314	3312	335	3371	356	3418
315	3315	336	3373	357	3420
316	3318	337	3375	358	3422
317	3322	338	3378	359	3423
318	3325	339	3380	360	3425
319	3328	340	3382	361	3427
320	3331	341	3385	362	3428
321	3334	342	3387	363	3430
322	3337	343	3389	364	3432
323	3339	344	3392	365	3433

Freeboards at intermediate lengths of ship shall be obtained by linear interpolation.

Freeboards, in mm, at length of ship less than 24 metres shall be -

50 +	[	150 (L)	]
	[	24	]

See also paragraph 3 of Schedule 4.

2. The following is the Freeboard Table B referred to in paragraph 5 of Schedule 4:-

TABLE B

FREEBOARD TABLE TYPES “B” SHIPS

Length of ship	Freeboard	Length of ship	Freeboard	Length of ship	Freeboard
(metres)	(millimetres)	(metres)	(millimetres)	(metres)	(millimetres)
24	200	72	754	120	1690
25	208	73	769	121	1709
26	217	74	784	122	1729
27	225	75	800	123	1750
28	233	76	816	124	1771
29	242	77	833	125	1793
30	250	78	850	126	1815
31	258	79	868	127	1837
32	267	80	887	128	1859
33	275	81	905	129	1880
34	283	82	923	130	1901
35	292	83	942	131	1921
36	300	84	960	132	1940
37	308	85	978	133	1959
38	316	86	996	134	1979
39	325	87	1015	135	2000
40	334	88	1034	136	2021
41	344	89	1054	137	2043
42	354	90	1075	138	2065
43	364	91	1096	139	2087
44	374	92	1116	140	2109
45	385	93	1135	141	2130
46	396	94	1154	142	2131
47	408	95	1172	143	2171
48	420	96	1190	144	2190
49	432	97	1209	145	2209
50	443	98	1229	146	2229
51	455	99	1250	147	2250
52	467	100	1271	148	2271
53	478	101	1293	149	2293
54	490	102	1315	150	2315
55	503	103	1337	151	2334
56	516	104	1359	152	2354
57	530	105	1380	153	2375
58	544	106	1401	154	2396
59	559	107	1421	155	2418
60	573	108	1440	156	2440
61	587	109	1459	157	2460
62	601	110	1479	158	2480
63	615	111	1500	159	2500
64	629	112	1521	160	2520
65	644	113	1543	161	2540
66	659	114	1565	162	2560
67	674	115	1587	163	2580
68	689	116	1609	164	2600
69	705	117	1630	165	2620
70	721	118	1651	166	2640
71	738	119	1671	167	2660
168	2680	221	3601	274	4327
169	2698	222	3615	275	4339
170	2716	223	3630	276	4350
171	2735	224	3645	277	4362
172	2754	225	3660	278	4373
173	2774	226	3675	279	4385
174	2795	227	3690	280	4397
175	2815	228	3705	281	4408
176	2835	229	3720	282	4420
177	2855	230	3735	283	4432
178	2875	231	3750	284	4443
179	2895	232	3765	285	4455
180	2915	233	3780	286	4467
181	2933	234	3795	287	4478
182	2952	235	3808	288	4490
183	2970	236	3821	289	4502
184	2988	237	3835	290	4513
185	3007	238	3849	291	4525
186	3025	239	3864	292	4537
187	3044	240	3880	293	4548
188	3062	241	3893	294	4560
189	3080	242	3906	295	4572
190	3098	243	3920	296	4583
191	3116	244	3934	297	4595
192	3134	245	3949	298	4607
193	3151	246	3965	299	4618
194	3167	247	3978	300	4630
195	3185	248	3992	301	4642
196	3202	249	4005	302	4654
197	3219	250	4018	303	4665
198	3235	251	4032	304	4676
199	3249	252	4045	305	4686
200	3264	253	4058	306	4695
201	3280	254	4072	307	4704
202	3296	255	4085	308	4714
203	3313	256	4098	309	4725
204	3330	257	4112	310	4736
205	3347	258	4125	311	4748
206	3363	259	4139	312	4757
207	3380	260	4152	313	4768
208	3397	261	4165	314	4779
209	3413	262	4177	315	4790
210	3430	263	4189	316	4801
211	3445	264	4201	317	4812
212	3460	265	4214	318	4823
213	3475	266	4227	319	4834
214	3490	267	4240	320	4844
215	3505	268	4252	321	4855
216	3520	269	4264	322	4866
217	3537	270	4276	323	4878
218	3554	271	4289	324	4890
219	3570	272	4302	325	4899
220	3586	273	4315	326	4909
327	4920	340	5055	353	5190
328	4931	341	5065	354	5200
329	4943	342	5075	355	5210
330	4955	343	5086	356	5220
331	4965	344	5087	357	5230
332	4975	345	5108	358	5240
333	4985	346	5119	359	5250
334	4995	347	5130	360	5260
335	5005	348	5140	361	5268
336	5015	349	5150	362	5276
337	5025	350	5160	363	5285
338	5035	351	5170	364	5294
339	5045	352	5180	365	5303

Freeboards at intermediate lengths of ship shall be obtained by linear interpolation.

Freeboards, in mm, at length of ship less than 24 metres shall be -

50 +	[	150 (L)	]
	[	24	]

See also paragraph 3 and 17 of Schedule 4.

SCHEDULE 6

Rule 29

STABILITY

PART I - INFORMATION AS TO STABILITY

The information relating to the stability of a ship to be provided for the master shall include the particulars specified below.

1. The ship's name, official number, port of registry, gross and register tonnages, principal dimensions, displacement, deadweight and draught to the Summer Load Line.

2. A profile view and, if necessary, plan views of the ship drawn to scale showing all compartments, tanks, storerooms and crew and passenger accommodation spaces, with their position relative to mid ship.

3. (1) The capacity and the longitudinal and vertical centre of gravity of every compartment available for the carriage of cargo, fuel, stores, feedwater, domestic water or water ballast.

• (2) In the case of vehicle ferry, the vertical centre of gravity of compartments designated for the carriage of vehicles shall be based on the estimated centres of gravity of the vehicles and not on the volumetric centres of the compartments.

4. (1) The estimated total weight and the longitudinal and vertical centre of gravity of each such total weight of -

• (a) the passengers and their effects; and

• (b) the crew and their effects.

• (2) In estimating such centres of gravity, passengers and crew shall be assumed to be distributed about the ship in the spaces they will normally occupy, including the highest decks to which either or both have access.

5. (1) The estimated weight and the disposition and centre of gravity of the maximum amount of deck cargo which the ship may reasonably be expected to carry on an exposed deck.

• (2) In the case of deck cargo, the arrival condition shall include the weight of water likely to be absorbed by the cargo. (For timber deck cargo the weight of water absorbed shall be taken as 15 per cent of the weight when loaded.)

6. A diagram or scale showing -

• (a) the load line mark and load lines with particulars of the corresponding freeboards; and

• (b) the displacement, tonnes per centimetre immersion, and deadweight corresponding to a range of mean draughts extending between the waterline representing the deepest load line and the waterline of the ship in light condition.

7. (1) A diagram or tabular statement showing the hydrostatic particulars of the ship, including the heights of the transverse metacentre and the values of the moment to change trim one centimetre. These particulars shall be provided for a range of mean draughts extending at least between the waterline representing the deepest load line and the waterline of the ship in light condition.

• (2) Where a tabular statement is used to comply with subparagraph (1), the intervals between such draughts shall be sufficiently close to permit accurate interpolation.

• (3) In the case of ships having raked keels, the same datum for the heights of centres of buoyancy and metacentres shall be used as for the centres of gravity referred to in paragraphs 3, 4 and 5.

8. The effect on stability of free surface in each tank in the ship in which liquids may be carried, including an example to show how the metacentric height is to be corrected.

9. (1) A diagram or table showing cross curves of stability, covering the range of draughts referred to in paragraph 7(1).

• (2) The information shall indicate the height of the assumed axis from which the righting levers are measured and the trim which has been assumed.

• (3) In the case of ships having raked keels, or where a datum other than the top of keel has been used, the position of the assumed axis shall be clearly defined.

• (4) Subject to subparagraph (5), only enclosed superstructures and efficient trunks as defined in paragraph 10 of Schedule 4 shall be taken into account in deriving such curves.

• (5) The following structures may be taken into account in deriving such curves if the Minister is satisfied that their location, integrity and means of closure will contribute to the ship's stability -

• (a) superstructures located above the superstructure deck;

• (b) deckhouses on or above the freeboard deck whether wholly or in part only;

• (c) hatchway structures on or above the freeboard deck.

• (6) Subject to the approval of the Minister in the case of a ship carrying timber deck cargo, the volume of the timber deck cargo, or a part thereof, may be taken into account in deriving a supplementary curve of stability appropriate to the ship when carrying such cargo.

• (7) An example shall be included to show how a curve of righting levers (GZ) may be obtained from the cross curves of stability.

• (8) In the case of a vehicle ferry or a similar ship having bow doors, ship-side doors or stern doors where the buoyancy of a superstructure is taken into account in the calculation of stability information, and the cross curves of stability are based upon the assumption that such doors are secured weathertight, there shall be a specific warning that such doors must be secured weathertight before the ship proceeds to sea.

10. (1) The diagram and statements referred to in subparagraph (2) shall be provided separately for each of the following conditions of the ship -

• (a) light condition. If the ship has permanent ballast, such diagram and statements shall be provided for the ship in light condition both with and without such ballast;

• (b) ballast condition both on departure and on arrival. It is to be assumed that on arrival oil fuel, fresh water, consumable stores and the like are reduced to 10 per cent of their capacity;

• (c) condition on departure and on arrival when loaded to the Summer load line with cargo filling all spaces available for cargo. Cargo shall be taken to be homogeneous except where this is clearly inappropriate, for example, in cargo spaces which are intended to be used exclusively for the carriage of vehicles or of containers;

• (d) service loaded conditions both on departure and on arrival.

• (2)
• (a) A profile diagram of the ship drawn to a suitable small scale showing the disposition of all components of the deadweight

• (b) A statement showing the lightweight, the disposition and the total weights of all components of the deadweight, the displacement, the corresponding positions of the centres of gravity, the metacentre and also the metacentre height (GM).

• (c) A diagram showing the curve of righting levers (GZ). Where credit is given for the buoyancy of a timber deck cargo the curve of righting levers (GZ) must be drawn both with and without this credit.

• (d) A statement showing the elements of stability in the condition compared to the criteria laid down in Schedule 2 paragraph 2(2).

• (3) The metacentric height (GM) and the curve of righting levers (GZ) shall be corrected for liquid free surface.

• (4) Where there is a significant amount of trim in any of the conditions referred to in subparagraph (1) the metacentric height and the curve of righting levers (GZ) may be required to be determined from the trimmed waterline.

• (5) If in the view of the Assigning Authority the stability characteristics in either or both of the conditions referred to in subparagraph (1)(c) are not satisfactory, such conditions shall be marked accordingly and an appropriate warning to the master shall be inserted.

11. A statement of instructions on appropriate procedures to maintain adequate stability in each case where special procedures are applied such as partial or complete filling of spaces designated for cargo, fuel, fresh water or other purposes.

12. The report on the inclining test and of the calculation derived from it to obtain information of the light condition of the ship.

PART II - INFORMATION IN RELATION TO WHICH THE MINISTER'S OR ASSIGNING AUTHORITY'S APPROVAL OF THE STABILITY INFORMATION IS REQUIRED

13. The ships referred to in rule 29(3), 4(a) and 5(a) of the Rules are as follows:

• (a) an oil tanker over 100 metres in length;

• (b) a bulk carrier, or an ore carrier, over 150 metres in length;

• (c) a single deck bulk carrier over 100 metres in length;

• (d) a single deck dry cargo ship over 100 metres in length;

• (e) a purpose built container ship over 125 metres in length.

SCHEDULE 7

Rule 13

NOTICE OF LOAD LINE TO BE POSTED UP BEFORE SAILING

1. In this Schedule -

“freeboard” means the distance measured vertically downwards amid ships from the upper edge of the deck-line marked on the side of the ship to the surface of the water;

“mean freeboard” means the mean of the freeboards on each side of the ship;

“mean draught” means the mean of the draughts shown on the scales of measurement on the stem and on the stem post of the ship;

Notice to be posted up on board ship

2. Before a ship leaves any dock, wharf or harbour or other place for the purpose of proceeding to sea, a notice is to be posted up in some conspicuous place on board ship in the form and containing the particulars in this Notice.

3. Paragraph 2 does not apply to ships employed on a near-coastal voyage.

Availability of Standard Form

4. Copies of the “Draught of Water and Freeboard” Notice, an example of which is attached, are available from the Department of the Marine and Natural Resources.

DRAUGHT OF WATER AND FREEBOARD

NOTICE

SHIP ......................................... PORT OF REGISTRY ............................. GROSS TONNAGE ............................

• (1) Summer freeboard ......................................... millimetres corresponding to a mean draught of ................. millimetres

• (2) Winter freeboard ........................................... millimetres corresponding to a mean draught of ................. millimetres

• (3) Tropical freeboard ......................................... millimetres corresponding to a mean draught of ................. millimetres

• (4) Winter North Atlantic freeboard ..................... millimetres corresponding to a mean draught of ................. millimetres

• (5) Allowance for fresh water for all freeboards other than Timber freeboards .................................................. millimetres

• (6) Timber Summer freeboard ............................. millimetres corresponding to a mean draught of ................. millimetres

• (7) Timber Winter freeboard ............................... millimetres corresponding to a mean draught of ................. millimetres

• (8) Timber Tropical freeboard ............................. millimetres corresponding to a mean draught of ................. millimetres

• (9) Timber Winter North Atlantic freeboard ......... millimetres corresponding to a mean draught of ................. millimetres

• (10) Allowance for fresh water for Timber freeboards ............................................................ ......................... millimetres

Notes

1. The particulars to be given above of freeboards and allowances for fresh water to be taken from the load line certificate currently in force in respect of the ship.

2. All freeboards given on the load line certificate must be stated.

3. The mean draught to be given above is the mean of the draughts which would be shown on the scales of measurement on the stem and on the stem post of the ship if it were so loaded that the upper edge of the load line on each side of the ship appropriate to the particular freeboard were on the surface of the water.

4. Where the draught is shown on the scales of measurement on the stem and on the stem post of the ship in feet the mean draught must be given in millimetres.

PARTICULARS OF LOADING

1	2	3	4	5	6	7	8	9
		ACTUAL DRAUGHT	ACTUAL DRAUGHT	ACTUAL DRAUGHT	MEAN FREEBOARD	MEAN FREEBOARD	SIGNATURE OF MASTER AND AN OFFICER	SIGNATURE OF MASTER AND AN OFFICER
DATE	PLACE	FORWARD	AFT	MEAN	ACTUAL (See notes 1 & 2)	CORRECTED (See note 3)	MASTER	AN OFFICER

Notes

1. The actual mean freeboard (Column 6) is the mean of the freeboards on each side of the ship at the time when the ship is loaded and ready to leave.

2. If the actual mean freeboard is less than the appropriate minimum saltwater freeboard as shown on the load line certificate these must be entered in Column 7 the corrected freeboard arrived at after making any allowances for density of water, rubbish to be discharged overboard and fuel, water and stores to be consumed on any stretch of river or inland water, being allowances duly entered in the ship's official log-book.

3. If the actual mean freeboard is greater than the appropriate salt water freeboard, Column 7 need not be filled in.

SCHEDULE 8

Rules 7, 10 and 11

IRISH LOAD LINE CERTIFICATES

Interpretation

1. In this Schedule -

“appropriate certificate” means -

• (a) in the case of a Convention-size ship, an International Load Line Certificate (1966), and

• (b) in the case of any other ship, an Irish Load Line Certificate.

Appropriate Certificates

2. (1) Subject to the provisions of rule 10, the Assigning Authority shall issue the appropriate certificate in respect of an Irish ship which has been surveyed and marked in accordance with these Rules.

• (2) If the certificate is an International Load Line Certificate (1966) it shall be in the form prescribed by the 1966 Convention.

• (3) If the certificate is an Irish Load Line Certificate it shall be in the form indicated below.

• (4) Subject to any exemption conferred by or under the Principal Act or, these Rules, a ship shall not proceed, or attempt to proceed, to sea unless the appropriate certificate is in force in respect of that ship.

Exemption Certificates

3. (1) Where a ship is exempted under subsections (2) or (4) of Section 20 of the Principal Act an “International Load Line Exemption Certificate” in the form prescribed by Annex III of the 1988 Protocol shall be issued in respect of the ship by the Minister; and

• (2) Where a ship is exempted under subsections (3) of such section an “Irish Load Line Exemption Certificate” in the form indicated below shall be issued in respect of the ship by the Minister which shall state the conditions with which the ship is to comply.

• (3) Exempt in so far as the nature or terms of any such exemption require the contrary:

• (a) the ship shall be assigned freeboards in accordance with rule 5

• (b) shall be subject to surveys in accordance with rule 6; and

• (c) rules 7 to 9 shall apply in relation to the certificate of exemption as they apply in relation to load line certificates,

subject to the substitution, for references in the said Rules to an Assigning Authority, of references to the Minister.

Non-Irish Ships

4. (1) The Minister may, at the request of a Government of a Convention country, survey a ship registered in that country and if satisfied that the requirements of the 1966 Convention are complied with and that a survey has been satisfactorily completed in accordance with these Rules, issue to the ship an International Load Line Certificate (1966) and, where appropriate, endorse such certificates in accordance with the requirements of the 1966 Convention. A certificate issued in accordance with such a request shall contain a statement that it has been so issued and shall have the same effect as if it was issued by that Government and not by the Minister.

• (2) An Irish Load Line Certificate may be issued to a non-Irish ship which has been surveyed and marked in accordance with these Rules.

• (3) Subject to paragraph (4), a certificate issued under paragraph (2) shall be subject to the same conditions and have the same effect as a similar certificate issued to an Irish ship.

• (4) Any certificate issued under paragraph (2) in respect of a ship registered in a Convention country shall be valid only so long as the ship is not plying on international voyages, and shall be cancelled by the Minister if he has reason to believe that the ship is plying on international voyages.

---

IRISH LOAD LINE CERTIFICATE

---

Issued under the provisions of the Merchant Shipping (Load Line) Rules 2001 under the authority of the Government of Ireland by [Full official designation of the Assigning Authority]

PARTICULARS OF SHIP

---

Name of Ship

---

Distinctive Number or Letters

---

Length(L) as defined by rule 2 of the Merchant Shipping (Load Line) Rules 2001

Gross Tonnage

---

Freeboard assigned as:	Type of ship

---

Freeboard from deck line	Freeboard from deck line	Load line
Tropical	____mm. (T)	____mm. above (S)
Summer	____mm. (S)	Upper edge of line through centre of ring
Winter	____mm. (W)	____mm. below (S)
Winter North Atlantic	____mm. (WNA)	____ mm. below (S)

Note: Freeboards and Load Lines which are not applicable need not be entered on the certificate.

Allowance for Fresh Water for all freeboards: _______mm.

The upper edge of deck line from which these freeboards are measured is

Date of initial or periodical survey

---

THIS IS TO CERTIFY

That this ship has been surveyed and the freeboards and load lines shown above have been assigned in accordance with the Merchant Shipping (Load Line) Rules, 2001.

This certificate is valid until _________ subject to annual surveys in accordance with those Rules.

Issued at __________	on ________
	Signed __________ Signature of authorised official issuing the certificate
	Name __________

---

Name of Ship

CONDITIONS:

THIS IS TO CERTIFY

that at an annual survey required by the Merchant Shipping (Load Line) Rules, 2001, this ship was found to comply with the relevant provisions of those Rules.

Place _________	Date ________
________	Name _____________
Signature, Department of the Marine and Natural Resources
Place _________	Date ________
________	Name _____________
Signature, Department of the Marine and Natural Resources
Place _________	Date ________
________	Name _____________
Signature, Department of the Marine and Natural Resources
Place _________	Date ________
________	Name _____________
Signature, Department of the Marine and Natural Resources

Survey of this ship having been satisfactorily completed in accordance with the provisions of the Merchant Shipping (Load Line) Rules, 2001 this Certificate is extended until _______

Place _________	Date ________
________	Name _____________
Signature of authorised official conducting the survey

Notes

1. When a ship departs from a port situated on a river or inland water, deeper loading shall be permitted corresponding to the weight of fuel and all other materials required for consumption between the point of departure and the sea.

2. When a ship is in fresh water of unit density, the appropriate load line may be submerged by the amount of the fresh water allowances shown above. Where the density is other than unity, an allowance shall be made proportional to the difference between 1.025 and the actual density.

3. This certificate must be kept framed and posted up in some conspicuous place on board the ship, so long as it remains in force and the ship is in use.

---

IRISH LOAD LINE EXEMPTION CERTIFICATE

---

Issued under the provisions of the Merchant Shipping (Load Line) Rules 2001 under the authority of the Government of Ireland by [Full official designation of the Assigning Authority]

PARTICULARS OF SHIP

---

Name of Ship

---

Distinctive Number or Letters

---

THIS IS TO CERTIFY

That the above-mentioned ship is exempted pursuant to Section 20(3) of the Merchant Shipping (Load Line) Act, 1968 from the following provisions of that Act:-

Subject to the following provisions:-

Date of initial or renewal survey

---

This certificate is valid until ______ subject, where appropriate, to annual surveys in accordance with the Merchant Shipping (Load Line) Rules, 2001.

Issued at ____________	on _________
Signed ________	Name ________
The Department of the Marine and Natural Resources

---

Name of Ship

CONDITIONS (Continued) :

THIS IS TO CERTIFY

That this ship continues to comply with the conditions under which the exemption was granted.

Place _________	Date ________
________	Name _____________
Signature, Department of the Marine and Natural Resources
Place _________	Date ________
________	Name _____________
Signature, Department of the Marine and Natural Resources
Place _________	Date ________
________	Name _____________
Signature, Department of the Marine and Natural Resources
Place _________	Date ________
________	Name _____________
Signature, Department of the Marine and Natural Resources
---	---
	GIVEN under my Official Seal, this 13 September day of September, 2001
	Frank Fahey
	Minister for the Marine and Natural Resources

EXPLANATORY NOTE

(This note is not part of the Rules)