Electronic position indicator
From International Dictionary of Marine Aids to Navigation
4-4-125
Electronic position indicator (E.P.I.)
A version of Loran in which the length of the base line is measured thus providing range information.
In practice the master station is placed on the survey vessel and two or more slave stations are temporarily set up ashore.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
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