Marine Compass

Marine Compass: Navigation Instrument

A marine compass helps determine direction relative to the Earth\u2019s magnetic poles, enabling navigation in visually challenging conditions.

What is Marine Compass?

A marine compass, also known as a nautical compass, is an essential tool for navigation at sea. It determines the cardinal directions - north, east, south, and west - by detecting and indicating the direction of a vessel relative to the Earth's magnetic poles.

Marine compasses consist of a magnetized needle or card mounted on a pivot point within a liquid-filled bowl. The needle aligns itself to the magnetic field of the Earth. As the ship changes direction, the needle remains pointed towards magnetic north, enabling mariners to steer and maintain direction.

Compared to magnetic compasses used on land, marine compasses are designed and constructed to withstand the pitch and roll of ships at sea. The bowl is filled with alcohol or mineral oil which dampens the swing of the card and needle, allowing the compass to settle quickly as the ship changes direction.

Modern vessels often have an electronic compass or GPS system. However, marine magnetic compasses remain the most reliable means of navigation in case of emergency or power failure. They function day and night under all sea conditions, without reliance on external power sources.

Marine Compass Features

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