Furuno 1934C-BB, GD-1920C-BB, 1954C-BB, 1964C-BB, 1944C-BB, 1834C-BB Plotter troubleshooting, If…

8. MAINTENANCE, TROUBLESHOOTING

8.7.3Plotter

Requires a FURUNO BB GPS receiver.

Plotter troubleshooting

If…

position is not fixed within three minutes

position is wrong

the track is not plotted

the bearing is wrong

Loran C (or Decca) TDs do not appear

Loran C (or Decca) TDs are wrong

the ship’s speed indication is not zero after the ship is stopped

Then…

•check that antenna connector is firmly fastened.

•check number of satellites received, on the GPS status display. (See page 8-12.) There should be three or more.

•check that the correct geodetic chart system is selected, on the GPS SENSOR SETTINGS menu.

•enter position offset, on the GPS SENSOR SETTINGS menu.

•track is not being plotted. (“H” icon appears at the top of the display.) Press the B: TRACK HALT soft key on the TRACKS & MARKS CONTROL menu to start plotting again.

•check that correct magnetic variation is entered, on the GENERAL SETUP menu.

•check that LORAN C (or DECCA) is selected at TD DISPLAY on the GENERAL SETUP menu. Also, check that proper Loran C (Decca) chains codes are entered, on the TD SETUP menu.

•enter TD offset, on the TD SETUP menu.

•try to decrease speed/course smoothing, on the GPS SENSOR SETTINGS menu.

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