Furuno GP-1600F - Manual (Page 35)

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2.8 Changing Waypoint Data
You may change the latitude and longitude position and comments
of waypoints you have entered, through the waypoint list.
1) Press the [WPT] key.
The menu for selection of waypoint entry method appears.
2) Press the [▲] key to select WPT List.
3) Press the [NU/CU ENT] key. The waypoint list appears.
4) Operate the [▲] or [▼] key to select waypoint number to
change.
5) Press the [NU/CU ENT] key. The confirmation window ap-
pears.
OVER WRITE
ENT:YES
ESC:NO
Figure 2-13 Window for over writing waypoint data
6) Press the [NU/CU ENT] key. The Editor display appears.
7) Press the [NU/CU ENT] key. To change position, operate the
[ t] or [s] key to select digit in position to change and press
appropriate numeric key.
8) Press the [▼] key to go to the MARK line. Select mark and
press the [NU/CU ENT] key.
9) The comment entry display appears. Change the comment by
selecting appropriate characters, selecting ENTER and press-
ing the [NU/CU ENT] key, or press the [NU/CU ENT] key to
keep the original comment.