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The forward part of a vessel’s starboard side, or the relative direction forward of the starboard beam. As a structural location it lies towards the bow on the right when facing forward. As a lookout report, an object on the starboard bow lies in the sector between approximately dead ahead and abeam to starboard. The…
The after part of a vessel’s starboard side, or the relative direction abaft the starboard beam. As a structural location it lies towards the stern on the right when facing forward. As a lookout report, an object on the starboard quarter lies in the sector between approximately abeam and astern to starboard. The directional reference…
The tack on which the wind is coming from the vessel’s starboard side. On a conventional fore-and-aft rig the mainsail and boom are normally to port, but sail position is evidence rather than the definition and backed or unusual sails can mislead. Tack is determined by the side from which the wind is received. Under…
A tensioned part of the standing rigging that supports a mast, normally in a fore-and-aft direction. Forestays lead forward and backstays lead aft, while additional inner or intermediate stays can support particular sections of the mast or carry sails. Stays may be wire, rod, fibre or another engineered component appropriate to the rig. They work…
A helm order to stop the vessel’s swing and maintain its present heading. The order tells the helm to use the rudder as necessary to arrest an ongoing turn and then keep the heading reached, rather than returning automatically to the heading held before the turn began. The heading should be reported or confirmed in…
An informal name for the forward masthead light shown by a power-driven vessel when underway. The expression “steaming light” is widely used on small craft, particularly for the white light displayed above the sidelights when a sailing vessel is proceeding under engine. In the collision regulations, the defined term is “masthead light,” not “steaming light.”…
The compass positioned so that the person steering can maintain and alter the vessel’s heading. It is normally mounted where its heading can be read readily from the helm and where vibration, movement and magnetic interference can be controlled. The compass may be magnetic or form part of an electronic heading system, depending on the…
The principal structural member or formed edge at the foremost part of a hull where its sides meet. In traditional construction the stem is a timber or metal member joining the keel and forward planking or plating. In moulded or welded hulls it may be an integrated shape rather than a separate piece, and it…
The rear or aft-most part of a vessel. The stern is opposite the bow and includes the after end of the hull and associated structure. Its form may be transom, counter, canoe, cruiser or another design and influences resistance, buoyancy, handling, wake and usable deck or accommodation space. Steering gear, propulsion, boarding arrangements, navigation lights…
A white navigation light showing over an unbroken 135-degree arc centred directly astern. Under the collision regulations it is arranged to show from dead astern to 67.5 degrees on each side of the vessel. Its required visibility range, height and relationship to other lights depend on vessel type, length and status. A sternlight identifies an…
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