Loran Drift control
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4-4-080
Drift control (in Loran)
The equipment control by means of which the local time base oscillator is brought into synchronisation with the transmitted time base.
In Loran C and in most Loran A receivers the final "lock-in" is accomplished automatically.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)