An arrangement with a pulley wheel to minimise chafing on lines pulled onto a vessel.

Related Terms


The rotating wheel of a centrifugal pump.


The compartment on a ship where the wheel is located; also called pilothouse or bridge.


The wheel or tiller controlling the rudder.


1. A teethed wheel which transfers rotating motion by engaging with another gera. 2. A general term for ropes, blocks, tackle and other equipment.


A platform jutting from ship’s deck for gun or wheel


A machine that develops rotary power by directing a high-velocity fluid against blades mounted around the rim of a wheel. As a high-velocity fluid passes through a turbine, it pushes against the blades and causes the wheel to turn. The rotation of the wheel turns the axle, which drives the connected machinery.


The expected response of a vessel to control mechanisms, such as a turn answering to the wheel and rudder. 'She won't answer' might be the report from a helmsman when turning the wheel under a pilot's order fails to produce the expected change of direction.


The usual steering device on larger vessels: a wheel with a horizontal axis, connected by cables to the rudder.


A truck that have three main units. The front section where the driver sits is called the cab or the tractor (because it pulls a load). Cargo is loaded into the metal box (container), which is loaded onto the wheel base called a chassis or a trailer.


A chronometer equipped with an electrical contact assembly and program wheel which automatically makes or breaks an electric circuit at precise intervals, the sequence and duration of circuitopen circuit closed conditions being recorded on a chronograph. The program sequence is controlled by the design of the program wheel installed. Various programs of make or break sequence, up to 60 seconds, are possible. In some chronometers the breaks occur every other second, on the even seconds, and a break occurs also on the 59th second to identify the beginning of the minute; in other chronometers, breaks occur every second except at the beginning of the minute. By recording the occurrence of events (such as star transits) on a chronograph sheet along with the chronometer breaks, the chronometer times of those occurrences are obtained.

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