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.
Commercial Fishing Vessel
Martha B
MMSI 367687930 · Call sign WDI3401
Not yet on Master's MateType
Commercial Fishing Vessel
Flag
USALength
12.8 m
Beam
4.4 m
Draft
2.2 m
Call sign
WDI3401
Official No.
1090277
AIS reports
1
Martha B, an American working fishing boat, measures 12.8 metres on deck. Martha B has 4.4 metres in the beam and a 2.2-metre draft. Her registration reads MMSI 367687930, call sign WDI3401. Sign Martha B 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 captains
Know where the fleet is. Get Martha B home safe.
Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.
Keep the fleet in sight — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Martha B roams, 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 captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Martha B on the map. It hands you the full bridge:
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.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
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 Martha B and switch it all on
Free to join · nothing to install to start · cancel anytime
About Martha B
What kind of vessel is Martha B?
Martha B is a Commercial Fishing Vessel flagged to United States of America.
What is Martha B's MMSI?
Martha B's MMSI is 367687930. Call sign WDI3401.
How big is Martha B?
Martha B is about 12.8 m long, 4.4 m on the beam, drawing 2.2 m.
Is Martha B on the Master's Mate Safety Initiative Network?
Not yet. If Martha B is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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