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Devices for facilitating the loading, positioning and lashing of containers. The cones insert into the bottom castings of the container.



Related Terms

D.P.

Dynamic positioning - A station keeping system for floating units which uses thrusters to compensate wind, wave and current forces in a dynamic controlled mode to keep the unit on a predetermined location and heading at sea.

MEDIUM RANGE SYSTEMS

Those radionavigation systems providing positioning capability beyond the range of short range systems, but their use is generally limited to ranges permitting reliable positioning for about 1 day prior to making landfall; Decca is an example.

OYSTER BED

On the sea bottom where oysters breed.

ARMING THE LEAD

Placing tallow in the recess in the bottom of the sounding lead to ascertain the nature of the sea bed.

DOCK SILL

The foundation at the bottom of the entrance to a dry dock or lock against which the caisson or gates close. The depth of water controlling the use of the dock or lock is measured from the sill to the surface.

CROWN WEIR

The highest point on the internal bottom surface of the crown of a plumbing trap.

PANCAKE AUGER

An auger having one spiral web, 12 to 15 inches (30 to 38 centimeters) in diameter, attached to the bottom end of a slender central shaft; used as removable deadman to which a drill rig or guy line is anchored.

GPS

Global Positioning System (see GNSS)

V BOTTOM

A hull with the bottom section in the shape of a 'V'.

ADJUSTABLE PARALLELS

Wedge-shaped iron bars placed with the thin end of one on the thick end of the other, so that the top face of the upper and the bottom face of the lower remain parallel, but the distance between the two faces is adjustable; the bars can be locked in position by a screw to prevent shifting.

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