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 W STONE
MMSI 366954190 · Call sign WYB7244
Not yet on Master's MateType
Towing Vessel
Flag
USALength
21 m
Beam
8 m
Draft
3.1 m
Call sign
WYB7244
Official No.
602406
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
64
JOHN W STONE is an American work boat, spanning 21 metres. Her hull carries 8 metres in the beam and a draft measuring 3.1 metres. She broadcasts as MMSI 366954190, call sign WYB7244. JOHN W STONE is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for working boats
Built for boats that work — like JOHN W STONE.
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
Last known position · Jun 4, 2026
Position
29.5573° N, 94.9157° W
Working the Gulf of Mexico? 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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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put JOHN W STONE 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 W STONE and switch it all on
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About JOHN W STONE
What kind of vessel is JOHN W STONE?
JOHN W STONE is a Towing Vessel flagged to United States of America.
Where was JOHN W STONE last seen?
JOHN W STONE was last reported in the Gulf of Mexico in Jun 2026 on public AIS.
What is JOHN W STONE's MMSI?
JOHN W STONE's MMSI is 366954190. Call sign WYB7244.
How big is JOHN W STONE?
JOHN W STONE is about 21 m long, 8 m on the beam, drawing 3.1 m.
Is JOHN W STONE on the Master's Mate Safety Initiative Network?
Not yet. If JOHN W STONE is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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