Wiktionary
gyrocompasses
n. (plural of gyrocompass English)
Usage examples of "gyrocompasses".
As a radio operator, Joss knew even better than I that, though there was still some sun-spot activity, it had reached its maximum in the previous year: and as an ex-aircraft radio operator, he knew that airliners flew on gyrocompasses, which neither sun-spots nor magnetic storms could ever affect in the slightest.