Samyung NAVIS800FS Instruction Manual page 54

The red line is shown from a start point of Waypoint to an arrival point of Waypoint and the Lat/Lon,
distance, direction, estimated time, approach speed and navigation time of the arrival point of the
waypoint are shown in a bottom-left of the plotter screen.
( ☞ Refer to 'Chapter 3 - 5. ■ GPS Plotter Display' )
In order to Navigation Cancellation, move
[2.SET]  [1.NAVIGATION SET]  [4.EXIT WPT/RTE/ANCHOR] and press
) button. ( ☞ Refer to '2.1.4 EXIT WPT/RTE/ANCHOR (Navigation Cancellation)' )
(
press
Ref. ] ☞
[ Watch Set Up
It is an opposite notion against the waypoint navigation. After memory of a certain of
the position, this function is used to return the position during the navigation. In turning
on ON, the relative information as such the position, direction is displayed according to
the navigation of the own-ship in a set position of the bottom-left screen.
After press
The Erase is same with one of 'Navigation Cancellation', move [2.SET] 
[1.NAVIGATION SET]  [4.EXIT
button or press
( ) button and select [4.WATCH], press button for set up.
WPT/RTE/ANCHOR] and press
( ) button.
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( ) button or
( )