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
John C
MMSI 367378890 · Call sign WDE6332
Not yet on Master's MateType
Towing Vessel
Flag
USALength
11.8 m
Beam
3.7 m
Draft
1.2 m
Call sign
WDE6332
Official No.
277968
AIS reports
1
John C, a service vessel flagged in the United States, measures 11.8 metres on deck. John C has a 3.7-metre beam and a 1.2 m draft. Look for MMSI 367378890, call sign WDE6332. Join John C to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for working boats
Built for boats that work — like John C.
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 John C roams, 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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Joining the Safety Initiative Network doesn't just put John C 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 John C and switch it all on
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About John C
What kind of vessel is John C?
John C is a Towing Vessel flagged to United States of America.
What is John C's MMSI?
John C's MMSI is 367378890. Call sign WDE6332.
How big is John C?
John C is about 11.8 m long, 3.7 m on the beam, drawing 1.2 m.
Is John C on the Master's Mate Safety Initiative Network?
Not yet. If John C is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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