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.
Offshore Supply Vessel
John Harvill
MMSI 367569030 · Call sign WDG7611
Not yet on Master's MateType
Offshore Supply Vessel
Flag
USALength
50 m
Beam
12.2 m
Draft
4 m
Call sign
WDG7611
IMO
9269697
Official No.
1139394
AIS reports
3
John Harvill is an American workboat, 50 metres in length. She carries a beam of 12.2 m and a 4 m draft. On AIS she appears as MMSI 367569030, call sign WDG7611, IMO 9269697. John Harvill belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.
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Built for boats that work — like John Harvill.
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 Harvill 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 Harvill 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 Harvill and switch it all on
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About John Harvill
What kind of vessel is John Harvill?
John Harvill is a Offshore Supply Vessel flagged to United States of America.
What is John Harvill's MMSI?
John Harvill's MMSI is 367569030. Call sign WDG7611. IMO 9269697.
How big is John Harvill?
John Harvill is about 50 m long, 12.2 m on the beam, drawing 4 m.
Is John Harvill on the Master's Mate Safety Initiative Network?
Not yet. If John Harvill is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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