APPENDIX 1 DIGITAL INTERFACE (IEC 61162-1 EDITION 4 (2010-11))
AP-6
Sentence description
AAM-Waypoint arrival alarm
ACK-Acknowledge alarm
ACN-Alert command
ALC-Cyclic alert list
$GPAAM,A,A,x.x,N,c--c,*hh<CR><LF>
1 2 3 4 5
1. Status (A=Arrival circle entered V=Not arrived)
2. Status (A=Perpendicular passed at waypoint, V=Not arrived)
3. Arrival circle radius, nm
4. Units of radius (nautical miles)
5. Waypoint ID
$**ACK,xxx,*hh<CR><LF>
1
1. Local alarm number (identifier)
$**ACN,hhmmss.ss,aaa,x.x,x.x,ca,a*hh<CR><LF>
1 2 3 4 5 6
1. Time (hh=00 to 23, mm=00 to 59, ss.ss=00.00 to 59.99), null
2. Manufacturer mnemonic code (3 digit alphanumeric code), null
3. Alert identifier (0 to 10322)
4. Alert instance (1 to 999999), null
5. Alert command (A=ACK from ext. equipment, Q=Request from ext.
equipment, O=Responsibility transfer, S=Silence from ext. equipment)
6. Sentence status flag (C should not be null field. Sentence without C
is not a command.)
$**ALC,xx,xx,xx,x.x, aaa,x.x,x.x,x.x,’’’’’’,*hh<CR><LF>
1 2 3 4 5 6 7 8 9
1. Total number of sentences this message (01 to 99)
2. Sentence number (01 to 99)
3. Sequential message identifier (00 to 99)
4. Number of alert entries (0 to 3)
5. Manufacturer mnemonic code (FEC, null)
6. Alert identifier (999 or 10001 to 10999)
7. Alert instance (null)
8. Revision counter (1 to 99)
9. Additional alert entries (same as 5 and 8)
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