Manual Input to the System
System Operation
8-18
Ocean TRx™ 4500 Installation and Operations Manual
8.3.3
Setting the GPS Position
Caution! This is only used if the GPS antenna malfunctions; changes will
be overwritten when the GPS antenna is functional again.
If for some reason there are no GPS position updates, or the GPS is malfunctioning or
disconnected, you can enter the ship’s position manually.
To enter the GPS position manually:
1. From the
Operation Screen
, open the
Commands
menu and select
Set GPS
. The
Set GPS
dialog box appears.
Figure
8-16: Set GPS Dialog Box
2. Enter values in the
Latitude
and
Longitude
fields.
The latitude and longitude angles are entered in decimal format. When calculating
decimal values, remember that 1
°
of arch is divided into 60 minutes, which are in turn
divided into 60 seconds. Therefore, each degree of arch contains 3600 seconds.
For example, 32.5125
°
of latitude are equivalent to 32
°
+ 0.5125
×
3600 = 1845
seconds. 1845 seconds equal 1845
÷
60 = 30 minutes and 45 seconds. 32.5125
°
of
latitude are therefore equivalent to 32
°
30 minutes and 45 seconds North (the positive
latitude value indicates that the position is north of the equator).
3. Click
OK (Enter)
. The new values are updated in the
Lat
and
Long
fields in the
Ship
Coordinates
window.
Figure
8-17: Ship Coordinates Window
