Master's MateSafety Initiative Network
The Master's Mate Safety Initiative Network (MMSIn) — like AAA for the ocean, but free & community-driven. Cruisers keeping each other safe: anchor-drag & distress alerts, a verified captains directory, and a watch network that has your back.
Towing Vessel
MARTIN CHALLENGER
MMSI 366874920 · Call sign WDN4652
Not yet on Master's MateType
Towing Vessel
Flag
USALength
115 m
Beam
18 m
Draft
2.8 m
Call sign
WDN4652
IMO
8644436
Official No.
1051672
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
87
MARTIN CHALLENGER is an American working craft, 115 metres LOA. Below, she has a 18-metre beam and a draft of 2.8 m. She's on record as MMSI 366874920, call sign WDN4652, IMO 8644436. Sign MARTIN CHALLENGER up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
Free forever · No credit card · for working boats
Built for boats that work — like MARTIN CHALLENGER.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 4, 2026
Position
30.1068° N, 93.3027° W
Working the Gulf of Mexico? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
Free with your claim · for working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put MARTIN CHALLENGER on the map. It hands you the full bridge:
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim MARTIN CHALLENGER and switch it all on
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About MARTIN CHALLENGER
What kind of vessel is MARTIN CHALLENGER?
MARTIN CHALLENGER is a Towing Vessel flagged to United States of America.
Where was MARTIN CHALLENGER last seen?
MARTIN CHALLENGER was last reported in the Gulf of Mexico in Jun 2026 on public AIS.
What is MARTIN CHALLENGER's MMSI?
MARTIN CHALLENGER's MMSI is 366874920. Call sign WDN4652. IMO 8644436.
How big is MARTIN CHALLENGER?
MARTIN CHALLENGER is about 115 m long, 18 m on the beam, drawing 2.8 m.
Is MARTIN CHALLENGER on the Master's Mate Safety Initiative Network?
Not yet. If MARTIN CHALLENGER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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