GlobalWatch
2
TM
AIS User Manual
42
Version 1.0
Also, the electronic chart display in use should be programmed to consider the antenna reference
points. Traffic images are represented in true distances only when all displayed targets, including
own vessel, are working with AIS position information, which considers Antenna reference points.
Sample:
Display:
CallSign = D11233
ShipName = M/V TUGELA
Length = 20m
Beam = 30m
RefPointExt = A170 B30 C15 D15m (location of the external GPS antenna)
RefPointInT = A170 B30 C9 D11m (location of the internal GPS antenna)
ShipType = Tug
With the up/down keys you may move from line to line and input the correct data. The last line
“ShipType:“ must be selected by actuating the left/right keys out of the pool of all possible types.
Actuate “Enter
”
Special is the setting of the GPS antenna position:
The first settings which have to be entered are Length and Beam of the ship in meters.
Next step: enter 2 values more per location to specify the distance from the bow and from the side.
Distances are to be set in meters.
A = the distance from bow to the antenna
B= the distance from the antenna to the stern
C = the distance from the port side to the antenna
D = the distance from the antenna to the starboard side
Example: Length =200m, A = 160m, Beam = 30m, D = 15m
Move with Up/down keys to the Length line. Type 200, actuate “Enter
”
Move one line down. Type 30, actuate “Enter
”
RefPtExt and RefPtInt both show “N/A” now.
Only one of the length values A or B must be entered and one of the width values C or D.
For our example in the RefPtExt – line type as follows:
A160D15 (without spaces)
Actuate “Enter
”
The full line as shown will be displayed: RefPtExt: A160 B40 C15 D15m
B and C are calculated by the AIS.
Do the same with the RefPtInt – line
Actuate soft key “Save”
Display: Data Saved
Y1-03-0182-1A
