Furuno GP-1670 Operator's Manual page 99

10. CUSTOMIZING YOUR UNIT
[DIFFERENTIAL CORRECTION]: Turn GPS differential correction on or off.
[SPEED FILTER]: The speed filter helps reduce unnecessary release of the anchor
watch alarm and random position data. The filter averages the GPS-generated data
to smooth position updates. The filter works best when stationary or in low-speed con-
ditions. The choices are [Off], [Low], [Medium] and [High]. [High] provides the greatest
degree of smoothing.
[GPS SIMULATION]: Set up the GPS simulator.
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[SIMULATION MODE] enables and disables the simulator. Set the course, speed,
date and time. [CURSOR CONTROL] allows control of the simulation speed and
course with the arrows on the CursorPad. Use the up and down arrows to control
speed; the right and left arrows to control course.
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