One Man Bridge Operations when a sole OOW maintains a navigational watch on the bridge without the support of additional personnel, other than a helmsman engaged in steering



Related Terms

PONTOON BRIDGE

A fixed floating bridge supported by pontoons.

PLATE GIRDER BRIDGE

A fixed bridge consisting, in its simplest form, of two flange plates welded to a web plate in the overall shape of an I.

PIVOT BRIDGE

A bridge in which a span can open by pivoting about a vertical axis.

PETTIT TRUSS

A bridge truss in which the panel is subdivided by a short diagonal and a short vertical member, both intersecting the main diagonal at its midpoint.

PEDESTAL

1. The support for a column. 2. A metal support carrying one end of a bridge truss or girder and transmitting any load to the top of a pier or abutment. 3. See blanking level. 4. A supporting part or the base of an upright structure, such as a radar antenna.

ORTHOTROPIC DECK

A bridge deck constructed typically of flat steel plate and longitudinal and transverse ribs; functions in carrying traffic and acting as top flanges of floor beams.

MOVABLE BRIDGE

A bridge in which either the horizontal or vertical alignment can be readily changed to permit the passage of traffic beneath it. Often called drawbridge (an anachronism).

LENARD SPIRAL

A type of magnetometer consisting of a spiral of bismuth wire and a Wheatstone bridge to measure changes in the resistance of the wire produced by magnetic fields and as a result of the transverse magnetoresistance of bismuth.

KELVIN BRIDGE

A specialized version of the Wheatstone bridge network designed to eliminate, or greatly reduce, the effect of lead and contact resistance, and thus permit accurate measurement of low resistance. Also known as double bridge; Kelvin network; Thomson bridge.

ICE APRON

A wedge-shaped structure which protects a bridge pier from floating ice.

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