Garmin GPSMAP 175 - Manual (Page 23)

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Whenever the GPSMAP 175 is in simulator mode, you can adjust your
speed and course from the navigation page using the R keypad. As you head
toward each waypoint in the tour route, try adjusting your boat speed and
course to get a feel for how the highway works.
To adjust the simulated boat speed:
1. Press the UP arrow of the R keypad to increase the speed in 5
knot/kph/mph increments. Press the DOWN arrow to decrease the speed
in the same increments.
To steer the boat:
1. Press the LEFT and RIGHT arrows of the R keypad.
Notice that as you get off course, the highway and waypoint pointer move
to guide you back on course. The base of the highway display also serves as a
graphic course deviation indicator (CDI), relative to the scale setting shown at
the bottom right of the page. The scale setting represents the total distance (or
the width) of the base of the highway display. The default graphic highway
setting is 1/4 nm, but can be set for a 1/2-, 1-, 2- or 4-nm range.
To change the highway display scale:
1. Press the
Z
key in either direction (up to increase, down to decrease).
The navigation page data fields may also be configured to display any of ten
different navigation values. Let’s change the VMG field to crosstrack error to
provide a digital readout of the distance we’re off course.
To change a data field:
1. Press the O key to display the position page options.
2. Highlight the ‘Change Data Fields?’ option and press T. The field highlight
will now appear in the top-left data field (starting with the BRG field).
3. Use the R keypad to move the field highlight to the VMG field and press T.
4. Highlight the ‘XTK’ option and press T, and press Q to finish.
GETTING STARTED
Using the Navigation Page
A. To reset the
simulator to steer
the desired course
automatically,
select the ‘Auto
COG’ setting from
the options page.
B. The highway scale
perspective can be
set to a 1/4-, 1/2-,
1-, 2-, or 4-nm/mi/km range with the ZOOM keys.
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175 Manual 7/31/98 3:56 PM Page 19