Simrad ER60 - REV B Operator's Manual page 105

Dialogue boxes and functions
Navigation: Distance
The echo sounder receives vessel distance information either
internally derived from speed information, via NMEA
datagrams, or from 1/200 nmi contact pulses.
Source - Select source.
Port - Select the input port.
Setup - Set up the selected port.
NMEA sentence - Select which datagram to use.
Distance - The current vessel distance can be set manually.
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