When a wind hits the front of the sails forcing the vessel astern.



Related Terms

CENTRE OF LATERAL RESISTANCE

(CLR): The centre of area of the designed underwater longitudinal profile of a hull around which a vessel will pivot from wind on the beam.

FRONT

Generally, the interface or transition zone between two air masses of different density. Since the temperature distribution is the most important regulator of atmospheric density, a front almost invariably separates air masses of different temperature. Along with the basic density criterion and the common temperature criterion, many other features may distinguish a front, such as a pressure trough, a change in wind direction, a moisture discontinuity, and certain characteristic cloud and precipitation forms. The term front is used ambiguously for: frontal zone, the three-dimensional zone or layer of large horizontal density gradient, bounded by frontal surfaces across which the horizontal density gradient is discontinuous (frontal surface usually refers specifically to the warmer side of the frontal zone); and surface front, the line of intersection of a frontal surface or frontal zone with the earth's surface or less frequently, with a specified constant-pressure surface.

BOW WAVE

  1. The wave set up by the bow of a vessel moving through the water. Also called WAVE OF DISPLACEMENT. 2. A shock wave in front of a body such as an airfoil

SWINGING CIRCLE

The range of drift in a circular direction normally due to current, tide or wind shift, when a vessel is moored to a buoy.

TO HAUL

To change the course of a sailing vessel to bring the wind farther forward, usually used with up, such as haul up.

CLR

Centre of lateral resistance - the centre of area of the designed underwater longitudinal profile of a hull around which a vessel will pivot from wind on the beam.

WIND-RODE

A vessel affected by the wind when at anchor.

FRONTOLYSIS

1 The dissipation of a front or frontal zone. 2. In general, a decrease in the horizontal gradient of an air mass property, principally density, and the dissipation of the accompanying features of the wind field.

TENDER

A tender ship is one which have a long period of roll but may list excessively in a strong wind and may be dangerous if a hold is flooded following a collision

KNOCKED DOWN

When a vessel is listed by the wind sufficiently to lie on her side.

Related questions

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