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.
Vessel
FOUR CAPTAINS
MMSI 367700540 · Call sign WDI4637
Not yet on Master's MateFlag
USACall sign
WDI4637
Official No.
1145305
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
86
Flying the American flag, FOUR CAPTAINS is a vessel. She's listed under MMSI 367700540, call sign WDI4637. FOUR CAPTAINS can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.
Free forever · No credit card
Is FOUR CAPTAINS your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 12:34 UTC
Position
47.5376° N, 122.2446° W
Status
Under way (engine)
Speed
0.0 kn
Course
360°
Crossing the Salish Sea? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put FOUR CAPTAINS on the map. It hands you the full bridge:
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.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
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.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim FOUR CAPTAINS and switch it all on
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About FOUR CAPTAINS
What kind of vessel is FOUR CAPTAINS?
FOUR CAPTAINS is a vessel flagged to United States of America.
Where was FOUR CAPTAINS last seen?
FOUR CAPTAINS was last reported in the Salish Sea in Jun 2026 on public AIS.
What is FOUR CAPTAINS's MMSI?
FOUR CAPTAINS's MMSI is 367700540. Call sign WDI4637.
Is FOUR CAPTAINS on the Master's Mate Safety Initiative Network?
Not yet. If FOUR CAPTAINS is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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