A diagram showing an elevation of the ship's sheer viewed from the broadside.

Related Terms

FEEL THE BOTTOM

The effect on a ship underway in shallow water which tends to reduce her speed, make her slow in answering the helm, and often make her sheer off course. The speed reduction is largely due to increased wave making resistance resulting from higher pressure differences due to restriction of flow around the hull. The increased velocity of the water flowing past the hull results in an increase in squat. Also called SMELL THE BOTTOM.

SHEER

The longitudinal curve of a vessel's decks in a vertical plane. Due to sheer, a vessel's deck height above the baseline is higher at the stem and stern than at amidships

BULWARK

Fore-and-aft vertical plating immediately above the upper edge of the sheer strake

BREAK

A discontinuation of a sheer line, for instance the break of poop or forecastle profile being higher than the waist's deck line.

COVE LINE

A decorative incision along the sheer of a vessel often picked out in gold or another contrasting colour.

HARPIN

A sheer sawn to shape as opposed to being bent to shape around the frames. The harpin may be only a portion of the sheer (usually the forward section) or the complete sheer.

POWDERHORN SHEER

A rise in the sheer towards the bow (at the shoulder) and a smaller rise at the stern to promote dryness.

PROFILE PLAN

Elevation of the longitudinal shape of a hull; sheer plan.

WEATHER DECK

The decks at the sheer that are designed to be watertight.

PERMANENT BENCHMARK

A readily identifiable, relatively permanent, recoverable benchmark that is intended to maintain its elevation without change over a long period of time with reference to an adopted datum, and is located where disturbing influences are believed to be negligible.

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