October 27, 2020

Special marks

Purpose. To indicate to the mariner a special area or feature the nature of which is apparent from reference to a chart, sailing directions or notices to mariners. Special marks may be lettered to indicate their purpose. Uses include the following: ODAS (Ocean Data Acquisition System) buoys. Traffic separation schemes […]
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October 27, 2020

New dangers

Definition. A newly discovered hazard to navigation not yet shown on the charts or included in sailing directions, nor sufficiently promulgated by notices to mariners, is termed a New Danger. The term covers naturally occurring obstructions such as sandbanks, or rocks or man-made dangers such as wrecks. Marking. Cardinal or […]
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October 27, 2020

Emergency procedures and boat handling: Stopping a vessel

Factors affecting the acceleration / deceleration of a vessel Before discussing methods of stopping a vessel, we should look at the factors that affect the acceleration and deceleration of a vessel . They are the following: Inertia. Here we are talking about the amount of energy required to move an […]
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October 27, 2020

Methods of stopping a vessel

One can stop a vessel by one of the following methods: Inertia stop. Stopping the engine(s) and coasting to a standstill with the friction of sea and air overcoming the ship’s inertia. The total distance run will depend on the type of vessel, the initial speed, the displacement, the trim […]
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