Geographical Area Calls - SEA 7157 Operator's Manual

GMDSS CLASS A CALLS

GEOGRAPHICAL AREA CALLS

To send an All Ships call to a specific
rectangular geographical area, select GEOAREA
with
DSC 8
Prompts will ask for the area's NW (top left)
corner in Latitude and Longitude format.
Prompts for the lower right corner will then
asked. The lower right corner can be up to 99
degrees from the reference (top left) corner.
The operator will be prompted to choose a
priority category or level of importance for the
call to be transmitted.
After selecting the priority category, select the
form of communications the receiving station
should use when responding to this call (TC1).
The secondary telecommand prompt (TC2) gives
details to clarify the TC1 selection.
After the TC2 option is selected, the operator is
prompted to include the position with the call,
switch to another working channel after the call
is transmitted, or no other information.
T .
D
3
U E
V F
3:03
1
Select QUADRANT OF
AREA'S NW CORNER
0=NE
2=SE
Top left reference corner for Geoarea call
3:03
1
NW CORNER: 47°N 122°W
48° LAT BY
DELTA LNG (0-99°):
Lower right corner for Geoarea call
3:04
1
1=ROUTINE
3=SAFETY
5=DISTRESS
3:04
1
1=F3E SPX
3=F1B FEC
5=CANT DO
7=F1BTTYR
Method of communications for response (TC1)
3:04
1
1=NEUTRAL
3=NO INFO
Details for response (TC2)
3:04
1
1=NO OTHER INFO
2=INCLUDE POSITION
3=ALT WORKING CHAN
SELECT 1-3
Final options before transmit
26
47° 47N 122° 19W
US EXAMP
A
1=NW
3=SW
47° 47N 122° 19W
US EXAMP
A
1
47° 47N 122° 19W
A US EXAMP
2=SHIP-BUS
4=URGENCY
Priority categories
47° 47N 122° 19W
A US EXAMP
2=F3E DPX
4=F1B ARQ
6=DATA
UP=MORE
47° 47N 122° 19W
US EXAMP
A
2=MEDICAL
47° 47N 122° 19W
US EXAMP
A
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