Coordinate Options; Updating Waypoint Coordinates - NorthStar 941X Reference Manual

saved list
avoid list
local list
Coordinate
Options
Updating
Waypoint
Coordinates
Page 42
All saved waypoints (stored by pressing the SAVE/MOB button, and
having a name such as –S001–) are listed in order of the time at which
they were saved, with the most recent first.
Up to 30 avoidance points within 100 nautical miles are listed in order of
their distance from your position.
In the LOCAL list, up to 30 of the closest waypoints within 100 nautical
miles are listed in order of distance from your position. This list is par-
ticularly useful when you wish to deal with only the waypoints in your
area. Even though you may have hundreds of waypoints stored, the local
waypoints are very often the only ones you are interested in. You may
find yourself using this list most of the time.
Whenever a waypoint list is displayed, you may display the waypoint's
coordinates on the right side of the screen in any of the following ways,
by pressing the COORD OPTION menu key:
1. latitude/longitude coordinates
2. coordinates originally used to save the waypoint (TDs, lat/lon)
3. distance and bearing from your position (this is often the most
useful way, since it may be easier to visualize "3 miles north" than
the digits of lat/lon coordinates).
The letter "S" to the right of the waypoint name indicates that the dis-
played coordinates were the ones used to store the waypoint (TDs vs.
lat/lon).
Often a waypoint is taken from a chart by measuring the approximate
coordinates with whatever accuracy is allowed by the chart. When you
sail to the waypoint, you may find its position is slightly different than
expected. The 941X has a special feature that allows you to easily re-
calibrate the waypoint by setting its coordinates to your precise position.
You can also use this feature to convert approximate loran TD coordi-
nates to precise GPS coordinates.
4 — Creating Waypoints and Routes 4 — Creating Waypoints and Routes 4 — Creating Waypoints and Routes 4 — Creating Waypoints and Routes Rev. D