Saab R5 - Interpretation of Output Sentences; Proprietary Output Sentences (PSTT); PSTT,10 A UTC Date and Time Sentence; PSTT,10 C Data Link Status Sentence

R5 SOLID AIS System
INTERPRETATION OF OUTPUT SENTENCES
7000 118-200, C2 Page 73
9 INTERPRETATION OF OUTPUT SENTENCES
9.1 Proprietary Output Sentences (PSTT)
In addition to the standardized IEC sentences, the R5 SOLID is able to output the
proprietary sentences listed below. All Saab TransponderTech Proprietary Sentences
have talker ID “PSTT”.
9.1.1 $PSTT,10A – UTC Date and Time
This sentence provides UTC Date and Time, i.e. R5 SOLID system time (based on
internal GNSS time). It is output approximately once every 10 seconds (± 1 s).
$PSTT,10A,YYYYMMDD,HHMMSS
Field
Format
Name
Comment
1
10A
Sentence Id
10A always
2
YYYYMMDD
Date
Year, month and day in decimal
notation.
(00000000 = Not available)
3
HHMMSS
Time
Hour, minute and second in
decimal notation.
(999999 = Not available)
Example: $PSTT,10A,20121028,135230*<FCS><CR><LF>
= Date October 28, 2012
= Time 13:52:30 UTC
9.1.2 $PSTT,10C – Data Link Status
This sentence provides information about the traffic on the VHF data link. It is output
approximately once every 60 seconds. Traffic load is calculated over the last frame (i.e.
60 seconds). Number of units is derived from the internal user list and is generally the
number of received units within the last few minutes.
$PSTT,10C,C,LLL,NNNN
Field
Format
Name
Comment
1
10C
Sentence Id
10C always
2
C
Channel
A = VDL Channel A
B = VDL Channel B
3
LLL
Traffic Load
Data link traffic load in
precent, 0-100.
4
NNNN
Number of Units
Number of units occupying the
data link
9.1.3 $PSTT,146 – System Operational Mode Status
This sentence reports the system operational mode. This sentence is output on
change, periodically every minute and on request using PSTT,101.
$PSTT,146,x,x,x*hh<CR><LF>
Field
Format
Name
Comment
1
146
Sentence Id
146 always
2
X
1 W Mode
0 = Default
1 = 1 Watt
3
X
System Mode
0 = Class A
1 = Inland
4
X
Transmit mode
0 = Normal
1 = Silent