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Units of Measure
The GPS 125 Sounder lets you select nautical
(default), statute, or metric units of measure for all
speed and distance fields.
To change the unit of measure:
1. Highlight the ‘UNITS’ field and press the
F
key.
2. Use
U
and
D
to select the desired unit of
measure.
3. Press the
F
key to confirm the selection.
Speed Filter
The speed filter allows you to determine how the
GPS 125 Sounder responds to changes in track or
ground speed. Three settings are available: Auto, On, or
Off. The ‘Auto’ setting is the default and will monitor
the changes in your current track and speed and adjust
the receiver’s response time automatically. The ‘On’ set-
ting allows you to manually enter a response time up to
300 seconds. Selecting a higher setting may be desirable
in slow-speed applications with frequent changes in
track.
To enter a value for the speed filter:
1. Highlight the ‘SPEED FILTER’ field and press
F
.
2. Select the ‘ON’ option and press
F
.
3. Highlight the “speed value” field and press
F
.
4. Select the desired number of seconds and press
F
.
Navigation &
Speed Filter
REFERENCE
54
Choose a navigation unit
you are familiar with or
that may be appropriate to
the situation in which the
GPS 125 Sounder is used.
The number entered repre-
sents a window of time the
GPS 125 Sounder considers
in adjusting to changes in
speed and track. For exam-
ple, if 12 seconds is entered,
the speed displayed will
constantly represent the
speed averaged over the last
12 seconds.
125 Man Rev B 7/23/98 11:48 AM Page 54