Garmin GPSMAP 188C Sounder User Manual download pdf (Page 22)

16 GPSMAP 188/188C Sounder Owner’s Manual

BASIC OPERATION > NAVIGATING TO A DESTINATION

To activate a TracBack using the NAV key:

1. Press NAV, highlight the Follow Track, and press ENTER.

2. Highlight the track you want to follow, and press ENTER.

3. Choose Original to navigate from the start to the end of

your trip, or choose Reverse to navigate from the end to the

start of your trip, and press ENTER.

4. To stop TracBack navigation, press NAV, highlight Stop

Navigation, and press ENTER.

When a TracBack is active, the GPSMAP 188/188C Sounder

takes the track log currently stored in memory and divides it into

segments called legs. Up to 50 (188) or 254 (188C) temporary

turns (BEGIN, TURN 1, TURN 2, TURN 3,...., TURN X, END)

are created to mark the most signiﬁcant features of the track log in

order to duplicate your exact path as closely as possible. To get the

most out of the TracBack feature, remember the following tips:

• Always clear the track log at the starting point.

• Set the Record Mode option on the track log setup page to

Fill or Wrap.

• The track log memory must contain at least two points to

create a TracBack route.

• If the track log interval is set to the Time option, the route

can not follow your exact path. For best performance, keep

the interval set to resolution.

• If the receiver is turned off or satellite coverage is lost during

your trip, the TracBack draws a straight line between any

point where coverage was lost and where it resumed.

• If the track log’s changes in distance and direction are too

complex, 254 waypoints can not mark your path accurately.

The receiver then assigns the 254 waypoints to the most

signiﬁcant points of your track, and simpliﬁes segments with

fewer changes in direction.

For more information on setting up the Track options and saved

tracks, see page 59.

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Garmin GPSMAP 188C Sounder User Manual Page 22