Marine Safety Regulations




3262
THE NEW ZEALAND GAZETTE.
[No. 77

Rule LXI.—Round of Beam Correction.

Where the round of beam of the freeboard deck is greater or less than the standard, the freeboard is decreased or increased respectively by one-fourth of the difference between the actual and the standard round of beam, multiplied by the proportion of the length of the freeboard deck not covered by enclosed superstructures. Twice the standard round of beam is the maximum for which allowance is given.

Minimum Freeboards.

Rule LXII.—Summer Freeboard.

The minimum freeboard in Summer is the freeboard derived from the Freeboard Table after corrections for departures from the standards and after deduction for superstructures.

The freeboard in salt water measured from the intersection of the upper surface of the freeboard deck with the outer surface of the shell is not to be less than 2 inches.

Rule LXIII.—Tropical Freeboard.

The minimum freeboard in the Tropical Zone is the freeboard obtained by a deduction from the Summer freeboard of ¼ inch per foot for Summer draught measured from the top of the keel to the centre of the disc.

The freeboard in salt water measured from the intersection of the upper surface of the freeboard deck with the outer surface of the shell is not to be less than 2 inches.

Rule LXIV.—Winter Freeboard.

The minimum freeboard in Winter is the freeboard obtained by an addition to the Summer freeboard of ¼ inch per foot of Summer draught, measured from the top of the keel to the centre of the disc.

Rule LXV.—Winter North Atlantic Freeboard.

The minimum freeboard for ships not exceeding 330 feet in length on voyages across the North Atlantic, North of latitude 36° N., during winter months, is the Winter freeboard plus two inches; for ships over 330 feet in length it is the Winter freeboard.

Rule LXVI.—Fresh Water Freeboard.

The minimum freeboard in fresh water of unit density is the freeboard obtained by deducting from the minimum freeboard in salt water ¼ inches, where

Δ = displacement in salt water in tons at the Summer load water-line, and

T = tons per inch immersion in salt water at the Summer load water-line.

Where the displacement at the Summer load water-line cannot be certified, the deduction is to be ¼ inch per foot of Summer draught, measured from the top of the keel to the centre of the disc.

Rule LXVII.—Freeboard Table for Steamers.

Basic Minimum Summer Freeboards for Steamers which comply with the Standards laid down in the Rules.

L. Freeboard. L. Freeboard. L. Freeboard. L. Freeboard.
Feet. Inches. Feet. Inches. Feet. Inches. Feet. Inches.
80 8·0 250 32·3 420 77·8 590 127·0
90 9·0 260 34·4 430 80·9 600 129·5
100 10·0 270 36·5 440 84·0 610 132·0
110 11·0 280 38·7 450 87·1 620 134·4
120 12·0 290 41·0 460 90·2 630 136·8
130 13·0 300 43·4 470 93·3 640 139·1
140 14·2 310 45·9 480 96·3 650 141·4
150 15·5 320 48·4 490 99·3 660 143·7
160 16·9 330 51·0 500 102·3 670 145·9
170 18·3 340 53·7 510 105·2 680 148·1
180 19·8 350 56·5 520 108·1 690 150·2
190 21·4 360 59·4 530 110·9 700 152·3
200 23·1 370 62·4 540 113·7 710 154·4
210 24·8 380 65·4 550 116·4 720 156·4
220 26·6 390 68·4 560 119·1 730 158·5
230 28·5 400 71·5 570 121·8 740 160·5
240 30·3 410 74·6 580 124·4 750 162·5


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🚂 Rules for determining Maximum Load Lines of Merchant Ships (continued from previous page)

🚂 Transport & Communications
Load Lines, Merchant Ships, Marine Safety, Regulations, Superstructure, Freeboard Deck, Sheer Profile, Round of Beam