The marine autopilot receives signals from directional sensors such as the gyrocompass and uses them to automatically control the helm for navigation.

The history of the TOKYO KEIKI marine autopilots dates back to 1925 with the development of the P1 single pilot and the P2 single pilot. Later TOKYO KEIKI integrated the gyrocompass into the autopilot unit("GYLOT") and also developed the "Navigation Console" with radar and other navigational instruments all built in. The performance and reliability of these products obtained the overwhelming support of the marine market. Today, TOKYO KEIKI offers the following series of autopilots.

PR-6000	For medium to large vessels
PR-2000	For small to medium vessels