RECORDING DRAFTS
The draft must be taken and recorded in each case when the ship is ready to leave any dock, wharf, harbour or other place for the purpose of proceeding to sea. On each occasion an entry must be made showing:
- The density of the water when the drafts were taken.
- Any allowance to be made in order to determine the freeboard when the ship first reaches salt water in respect of water density.
- The mean draft and freeboard which the ship will have on reaching salt water after making allowances in respect of water density.
- The entries required under (a), (b) and (c) above need not be made if, at the time the drafts were taken, the maximum draft the ship could be loaded for that voyage was not exceeded. (See Approved Stability Data for Maximum Draft at Stern and Bow Height).
For the purposes of these records the draft taken from the ship’s draft marks are acceptable.
ASSESSMENT OF ACTUAL AND EXPECTED WEATHER
Before commencement of and during any voyage the Master and the officer on watch should continuously assess both the actual and expected weather using both official forecasts, facsimile weather maps and their own observation.
Such assessment should take account of the following:
- The effect of wind and sea on manoeuvring, particularly during unberthing and berthing.
- The effect of wind and sea on the behaviour of the vessel during the voyage and the advisability of reducing the motion of the vessel for the comfort and safety of personnel and cargo. In certain circumstances, rolling and/or pitching may be reduced by alteration of course or reduced speed or both.
- Poor visibility making it necessary to reduce to safe speed, alter course, etc. as required to ensure safety.
- The scientific programme of work.
Read: Passage Plane
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