Gyrocompass and Mariner's compass

Gyrocompass noun - A compass that does not depend on magnetism but uses a gyroscope instead.

Mariner's compass and gyrocompass are semantically related. In some cases you can replace phrase "Mariner's compass" with "Gyrocompass", this terms are similar.

Mariner's compass noun - Compass in the form of a card that rotates so that 0 degrees or North points to magnetic north.

Gyrocompass and mariner's compass are semantically related. Sometimes you can replace term "Gyrocompass" with "Mariner's compass", this terms are similar.