Beacon

Beacon is an easily seen light or a radio signal. A beacon is used especially to aid ships or... More >>

Buoy

Buoy, boy or BOO ee, is a floating object which is anchored in the water to guide ships. Buoys... More >>

Compass

Compass is a device for determining direction. The simplest form of the compass is a magnetized... More >>

Fathometer

Fathometer, fa THOM uh tuhr, is an instrument used on ships to measure the depth of the water. It... More >>

Global Positioning System

Global Positioning System, or GPS, is a worldwide navigation system that uses radio signals... More >>

Great-circle route

Great-circle route is the shortest, most direct route between two points on the earth's surface.... More >>

Gyrocompass

Gyrocompass is a mechanical device that determines direction. It is used in navigating all major... More >>

Gyroscope

Gyroscope, JY ruh skohp, also called a gyro, is a device that uses rotation to produce a stable... More >>

Gyrostabilizer

Gyrostabilizer is a large gyroscope that reduces the rolling of a ship at sea and makes travel... More >>

Lighthouse

Lighthouse is a tower with an extremely strong light that serves as a navigational aid for... More >>

Lightvessel

Lightvessel is a type of ship or buoy that acts as a lighthouse. Most lightvessels are automatic,... More >>

Loran

Loran, LAWR an, stands for long range navigation. It is a system of radio navigation that helps... More >>

Navigation

Navigation is the process of determining a vehicle's position and directing its movement.... More >>

Sextant

Sextant is an optical instrument that measures the angular distance between any two points, such... More >>

Shoran

Shoran, an abbreviation for short range navigation, is an electronic system used for short-range... More >>