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.
Passenger (Inspected)
Capt John
MMSI 366951590 · Call sign WDP8404
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
20.9 m
Beam
8.2 m
Draft
2.9 m
Call sign
WDP8404
Official No.
1152450
AIS reports
2
Capt John is a passenger boat registered in the United States, measuring 20.9 metres. Capt John has a 8.2-metre beam and a 2.9 m draft. She's on record as MMSI 366951590, call sign WDP8404. The Master's Mate Safety Initiative Network welcomes Capt John — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Capt John safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Capt John 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 passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Capt John on the map. It hands you the full bridge:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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 Capt John and switch it all on
Free to join · nothing to install to start · cancel anytime
About Capt John
What kind of vessel is Capt John?
Capt John is a Passenger (Inspected) flagged to United States of America.
What is Capt John's MMSI?
Capt John's MMSI is 366951590. Call sign WDP8404.
How big is Capt John?
Capt John is about 20.9 m long, 8.2 m on the beam, drawing 2.9 m.
Is Capt John on the Master's Mate Safety Initiative Network?
Not yet. If Capt John is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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