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
OCEAN MARINER
MMSI 303304000 · Call sign WCF3990
Not yet on Master's MateType
Towing Vessel
Flag
USALength
27.5 m
Beam
8.2 m
Draft
3.8 m
Call sign
WCF3990
IMO
8516433
Official No.
662872
AIS reports
1
OCEAN MARINER, an American service vessel, measures 27.5 metres on deck. She carries a 8.2 m beam and a 3.8 m draft. Her papers read MMSI 303304000, call sign WCF3990, IMO 8516433. OCEAN MARINER belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.
Free forever · No credit card · for working boats
Built for boats that work — like OCEAN MARINER.
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
Wherever OCEAN MARINER 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 boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put OCEAN MARINER 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 OCEAN MARINER and switch it all on
Free to join · nothing to install to start · cancel anytime
About OCEAN MARINER
What kind of vessel is OCEAN MARINER?
OCEAN MARINER is a Towing Vessel flagged to United States of America.
What is OCEAN MARINER's MMSI?
OCEAN MARINER's MMSI is 303304000. Call sign WCF3990. IMO 8516433.
How big is OCEAN MARINER?
OCEAN MARINER is about 27.5 m long, 8.2 m on the beam, drawing 3.8 m.
Is OCEAN MARINER on the Master's Mate Safety Initiative Network?
Not yet. If OCEAN MARINER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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