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)
MR. JOHN
MMSI 368351120 · Call sign WDP4078
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
14.3 m
Beam
5.2 m
Draft
2.6 m
Call sign
WDP4078
Official No.
1343745
AIS reports
1
Out of the United States, MR. JOHN is a 14.3-metre excursion vessel. MR. JOHN has a beam of 5.2 m and a 2.6-metre draft. She broadcasts as MMSI 368351120, call sign WDP4078. Sign MR. JOHN 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 passenger & charter operators
Keep every soul aboard MR. 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 MR. 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 MR. 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 MR. JOHN and switch it all on
Free to join · nothing to install to start · cancel anytime
About MR. JOHN
What kind of vessel is MR. JOHN?
MR. JOHN is a Passenger (Inspected) flagged to United States of America.
What is MR. JOHN's MMSI?
MR. JOHN's MMSI is 368351120. Call sign WDP4078.
How big is MR. JOHN?
MR. JOHN is about 14.3 m long, 5.2 m on the beam, drawing 2.6 m.
Is MR. JOHN on the Master's Mate Safety Initiative Network?
Not yet. If MR. JOHN is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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