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The AIS-MOB PGN Glitch: Why Your Chartplotter is Blind to Your SOS

The AIS-MOB PGN Glitch: Why Your Chartplotter is Blind to Your SOS

AuthorMike Callahan
PublishedApril 15, 2026
Read Time12 min
UpdatedApril 15, 2026
Quick Brief

TL;DR Protocol

  • Identifies the PGN 129041 mapping conflict that prevents MOB icons from appearing on modern Garmin and Raymarine MFDs. Learn how to fix the 'Blind Spot' before your next offshore passage.
UNIT-REF: BG-NAV-742
#AIS-MOB not showing on Garmin#Raymarine MOB icon glitch#NMEA 2000 PGN 129041 conflict#ocean signal MOB1 chartplotter fix#AIS man overboard beacon setup#marine electronics safety glitch
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Mike Callahan
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Institutional Author

Mike Callahan

Senior Marine Service Advisor & NMEA Electronics Specialist • 35,000 Miles

“USCG Licensed Captain and NMEA-certified technician with 22 years of experience in powerboat diagnostics and offshore communication systems.”

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