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electronic position indicator, EPI
1. An electronic tool that displays the navigational positions of ocean craft.
2. A radio navigation system used in hydrographic surveying (surveying, and mapping of the oceans, seas, and rivers) which provides circular lines of positions.
3. An apparatus used to measure ship-to-shore distances by measuring the time elapsed for a radio echo to take place.
This entry is located in the following units: electro-, electr-, electri- (page 67) -tron, -tronic, -tronics + (page 11)