swinging compass

swinging compass

[′swiŋ·iŋ ¦käm·pəs]
(navigation)
An accurate portable magnetic compass used to indicate magnetic headings during aircraft magnetic compass calibration.
References in periodicals archive ?
The question is important because Amis's writing has enjoyed a wide diffusion during a period of contested democratization and feminization in which he and his writing have constituted a swinging compass for the passage of post-war Britain.