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.
Sailing
DR. JOHN
Sailing · last seen Jun 2026 · MMSI 338526835 · Call sign UNKNOWN
Not yet on Master's MateType
Sailing
Length
14 m
Beam
4 m
Call sign
UNKNOWN
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
7
DR. JOHN is a sailing boat, 14 metres long. Her hull carries a beam measuring 4 metres. On AIS she appears as MMSI 338526835, call sign UNKNOWN. Bring DR. JOHN aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card · for cruisers
Sleep easy on the hook aboard DR. JOHN.
GPS-precise anchor-drag alarms, ETA-calibrated weather routing, worldwide charts, and cruisers watching each other’s backs.
Set her anchor watch — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jan 1, 1970 00:00 UTC
Position
0.0000° N, 0.0000° E
Status
Under way (engine)
Wherever DR. 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 cruisers
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put DR. JOHN 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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
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.
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.
Claim DR. JOHN and switch it all on
Free to join · nothing to install to start · cancel anytime
About DR. JOHN
What kind of vessel is DR. JOHN?
DR. JOHN is a Sailing.
What is DR. JOHN's MMSI?
DR. JOHN's MMSI is 338526835. Call sign UNKNOWN.
How big is DR. JOHN?
DR. JOHN is about 14 m long, 4 m on the beam.
Is DR. JOHN on the Master's Mate Safety Initiative Network?
Not yet. If DR. JOHN is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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