compass error


Also found in: Acronyms.

compass error

[′käm·pəs ‚er·ər]
(navigation)
The angle by which a compass direction differs from the true geographical direction; assuming that there is no lubber line error, it is the algebraic sum of the declination, variation, and motion errors.

compass error

The algebraic sum of deviation and variation. Easterly deviations and variations are given a “+” sign, while westerly deviation and variation are given a “−” sign.
References in periodicals archive ?
The class features basic navigation, which includes: international code signaling, beach markers, fire fighting, navigational math, predicting tides, tidal currents, magnetic compass, compass error, marlinespike seamanship, piloting, navigation rules and watercraft operations.
New titles among the Penguin Modern Classics series include: Sybille Bedford's A Compass Error ([pound]6.
Momentary compass errors due to shock and sudden accelerations are eliminated by GyroTrac's three-axis rate gyro stabilization.
With either of the other two instruments, which usually employ vacuum- or pressure-driven gyros to eliminate many compass errors, care must be taken to ensure they're properly spun up to operating speed before even thinking about beginning a zero-zero takeoff.