1. An acronym for SOund Navigation And Ranging, a method of using sound pulses to detect, range, and sometimes image underwater targets and obstacles or the bed of the sea. 2. The equipment used to conduct such searches, ranging, and imaging.

Related Terms

SAFETY CONTROL

Device to stop unit, equipment or system if unsafe pressure and/or temperatures and/or dangerous conditions are reached.

RUNNING TIME

Amount of time an unit, equipment or system is run per hour or per 24 hours.

ACOUSTIC

A term pertaining to sound, or the science of sound.

AMBIENT NOISE

The normal sound in a room or other location.

AIRBORNE SOUND

Sound which reaches the point of interest by radiation through the air.

GRID NAVIGATION

Navigation by the use of grid directions

HOMING

Navigation toward a point by following a signal from that point. Radiobeacons are commonly used for homing.

HYDRAULIC CURRENT

A current in a channel caused by a difference in the surface level at the two ends. Such a current may be expected in a strait connecting two bodies of water in which the tides differ in time or range. The current in the East River, N.Y., connecting Long Island Sound and New York Harbor, is an example.

INERTIAL ALIGNMENT

The process of orienting the measuring axes of the inertial components of inertial navigation equipment with respect to the coordinate system in which the equipment is to be used. inertia

INERTIAL ALIGNMENT

The process of orienting the measuring axes of the inertial components of inertial navigation equipment with respect to the coordinate system in which the equipment is to be used. inertia

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