Missing support for DSC NMEA alerts and messages

[mgrouch]

SignalK/nmea0183-signalk#217

[mgrouch]

See https://github.com/adrianmo/go-nmea/ (DSC, DSE)

https://www.cruisersforum.com/forums/f13/nmea-0183-sentences-dsc-dse-124887.html

https://continuouswave.com/whaler/reference/DSC_Datagrams.html

https://web.archive.org/web/20190303170916/http://continuouswave.com/whaler/reference/DSC_Datagrams.html

https://github.com/mariokonrad/marnav/blob/master/src/marnav/nmea/dsc.cpp

https://github.com/mariokonrad/marnav/blob/master/src/marnav/nmea/dse.cpp

[mgrouch]

And NavTex

https://www.pentestpartners.com/security-blog/hacking-navtex-maritime-warning-messages/

Source messages look like this:

    $CRNRX,007,001,00,TD02,1,135600,27,06,2001,241,3,A,==========================*09
    $CRNRX,007,002,00,,,,,,,,,,========^0D^0AISSUED ON SATURDAY 06 JANUARY 2001.*29
    $CRNRX,007,003,00,,,,,,,,,,^0D^0AINSHORE WATERS FORECAST TO 12 MILES^0D^0AOFF*0D
    $CRNRX,007,004,00,,,,,,,,,,SHORE FROM 1700 UTC TO 0500 UTC.^0D^0A^0D^0ANORT*70
    $CRNRX,007,005,00,,,,,,,,,,H FORELAND TO SELSEY BILL.^0D^0A12 HOURS FOREC*16
    $CRNRX,007,006,00,,,,,,,,,,AST:^0D^0A^0ASHOWERY WINDS, STRONGEST IN NORTH.^0D*15
    $CRNRX,007,007,00,,,,,,,,,,^0A^0A*79

The syntax is as follows:

$CRNRX <number of lines in message>,<message identifier (B1B2B3B4)>,<line number>, <frequency>, <day of month>,<month>,<year>,<time in UTC>,<error rate> then a 2 byte XOR checksum

Preceded by ZCZC and terminated with NNNN

The Message Identifier is made up of

    B1: transmitter identity
    B2: subject indicator
    B3&B4: serial number of the subject indicator

[mgrouch]

See also:

OpenCPN/OpenCPN#2813

OpenCPN/OpenCPN#2814

[mgrouch]

Safety Messages NMEA ammendement

SM1, SM2, SM3, SM4

http://www.nmea.org/Assets/20130816%20nmea%200183%20safetynet%20amendment.pdf

Examples:

$CSSM3,123456,005213,798,0,3,14,00,2012,04,05,14,30,3400,N,076,W,300*hh
$CSSMB,008,001,0,123456,FROM:Maritime Rescue Coordination Centre xxx^0D^0ATO:*hh
$CSSMB,008,002,0,123456, ALL SHIPS IN xxxxxxx^0D^0ASAR SITREP NO: 02^0D^0AFIS*hh
$CSSMB,008,003,0,123456,HING BOAT 'xxx' WITH THREE PERSONS ON BOARD DEPARRTED*hh
$CSSMB,008,004,0,123456, FROM xxx ISLAND ON^0D^0Axxx AT NOONTIME AND SINCE TH*hh
$CSSMB,008,005,0,123456,EN NO INFORMATION ABOUT HER. PARTICULARS ...^0D^0ASHI*hh
$CSSMB,008,006,0,123456,PS SAILING IN VICINITY ARE KINDLY REQUESTED TO KEEP A*hh
$CSSMB,008,007,0,123456, SHARP LOOK OUT^0D^0AINFORMING MRCC^0D^0AREGARDS^0D*hh
$CSSMB,008,008,0,123456,^0A DUTY OFFICER*hh
/g:1-9-1234*hh/$CSSM3,123456,005213,798,0,3,14,00,2012,04,05,14,30,3400,N,076,W,300*hh
/g:2-9-1234*hh/$CSSMB,008,001,0,123456,FROM:Maritime Rescue Coordination Centre xxx^0D^0ATO:*hh
/g:3-9-1234*hh/$CSSMB,008,002,0,123456, ALL SHIPS IN xxxxxxx^0D^0ASAR SITREP NO: 02^0D^0AFIS*hh
/g:4-9-1234*hh/$CSSMB,008,003,0,123456,HING BOAT 'xxx' WITH THREE PERSONS ON BOARD DEPARRTED*hh
/g:5-9-1234*hh/$CSSMB,008,004,0,123456, FROM xxx ISLAND ON^0D^0Axxx AT NOONTIME AND SINCE TH*hh
/g:6-9-1234*hh/$CSSMB,008,005,0,123456,EN NO INFORMATION ABOUT HER. PARTICULARS ...^0D^0ASHI*hh
/g:7-9-1234*hh/$CSSMB,008,006,0,123456,PS SAILING IN VICINITY ARE KINDLY REQUESTED TO KEEP A*hh
/g:8-9-1234*hh/$CSSMB,008,007,0,123456, SHARP LOOK OUT^0D^0AINFORMING MRCC^0D^0AREGARDS^0D*hh
/g:9-9-1234*hh/$CSSMB,008,008,0,123456,^0A DUTY OFFICER*hh
/g:1-9-1234,c:1333636200*hh/$CSSM3,123456,005213,798,0,3,14,00,2012,04,05,14,30,3400,N,076,W,300*hh
/g:2-9-1234*hh/$CSSMB,008,001,0,123456,FROM:Maritime Rescue Coordination Centre xxx^0D^0ATO:*hh
/g:3-9-1234*hh/$CSSMB,008,002,0,123456, ALL SHIPS IN xxxxxxx^0D^0ASAR SITREP NO: 02^0D^0AFIS*hh
/g:4-9-1234*hh/$CSSMB,008,003,0,123456,HING BOAT 'xxx' WITH THREE PERSONS ON BOARD DEPARRTED*hh
/g:5-9-1234*hh/$CSSMB,008,004,0,123456, FROM xxx ISLAND ON^0D^0Axxx AT NOONTIME AND SINCE TH*hh
/g:6-9-1234*hh/$CSSMB,008,005,0,123456,EN NO INFORMATION ABOUT HER. PARTICULARS ...^0D^0ASHI*hh
/g:7-9-1234*hh/$CSSMB,008,006,0,123456,PS SAILING IN VICINITY ARE KINDLY REQUESTED TO KEEP A*hh
/g:8-9-1234*hh/$CSSMB,008,007,0,123456, SHARP LOOK OUT^0D^0AINFORMING MRCC^0D^0AREGARDS^0D*hh
/g:9-9-1234*hh/$CSSMB,008,008,0,123456,^0A DUTY OFFICER*hh 
/g:1-9-1234,s:egcterm1,n:213,c:1333636200*hh/$CSSM3,123456,005213,798,0,3,14,00,2012,04,05,14,30,3400,N,076,W,300*hh
/g:2-9-1234,n:214*hh/$CSSMB,008,001,0,123456,FROM:Maritime Rescue Coordination Centre xxx^0D^0ATO:*hh
/g:3-9-1234,n:215*hh/$CSSMB,008,002,0,123456, ALL SHIPS IN xxxxxxx^0D^0ASAR SITREP NO: 02^0D^0AFIS*hh
/g:4-9-1234,n:216*hh/$CSSMB,008,003,0,123456,HING BOAT 'xxx' WITH THREE PERSONS ON BOARD DEPARRTED*hh
/g:5-9-1234,n:217*hh/$CSSMB,008,004,0,123456, FROM xxx ISLAND ON^0D^0Axxx AT NOONTIME AND SINCE TH*hh
/g:6-9-1234,n:218*hh/$CSSMB,008,005,0,123456,EN NO INFORMATION ABOUT HER. PARTICULARS ...^0D^0ASHI*hh
/g:7-9-1234,n:219*hh/$CSSMB,008,006,0,123456,PS SAILING IN VICINITY ARE KINDLY REQUESTED TO KEEP A*hh
/g:8-9-1234,n:220*hh/$CSSMB,008,007,0,123456, SHARP LOOK OUT^0D^0AINFORMING MRCC^0D^0AREGARDS^0D*hh
/g:9-9-1234,n:221*hh/$CSSMB,008,008,0,123456,^0A DUTY OFFICER*hh

See also
OpenCPN/OpenCPN#2814
mariokonrad/marnav#47
mariokonrad/marnav#48
mariokonrad/marnav#49

[mgrouch]

Also

NMEA 0183 Amendment to RLM Sentence

Technical Bulletin - National Marine Electronics Association

NMEA 0183 Man Overboard Notification (MOB) Sentence

Technical Bulletin - National Marine Electronics Association
Amendment to NMEA0183 Version 4.10 # AT 0183 20150115

SMV Amendment to NMEA 0183 Version 4.10 20180615

google for "nmea 0183 amendment"

[mgrouch]

reported to OpenCPN and SignalK