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.
Cargo
JOHN G MUNSON
MMSI 366971360 · Call sign WDH7557
Not yet on Master's MateType
Cargo
Flag
USALength
234 m
Beam
22 m
Draft
7.9 m
Call sign
WDH7557
IMO
5173670
Official No.
264136
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
73
JOHN G MUNSON flies the American flag — a 234-metre general cargo ship. Her hull carries a 22-metre beam and a draft measuring 7.9 metres. On the registers she's MMSI 366971360, call sign WDH7557, IMO 5173670. Sign JOHN G MUNSON 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 commercial operators
Eyes on JOHN G MUNSON, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 08:49 UTC
Position
47.5481° N, 88.4121° W
Status
Under way (engine)
Speed
14.3 kn
Course
79°
Destination
MARQUETTE
ETA
06-09 16:00 UTC
Transiting Lake Superior? 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 G MUNSON on the map. It hands you the full bridge:
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
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 G MUNSON and switch it all on
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About JOHN G MUNSON
What kind of vessel is JOHN G MUNSON?
JOHN G MUNSON is a Cargo flagged to United States of America.
Where was JOHN G MUNSON last seen?
JOHN G MUNSON was last reported in Lake Superior in Jun 2026 on public AIS.
What is JOHN G MUNSON's MMSI?
JOHN G MUNSON's MMSI is 366971360. Call sign WDH7557. IMO 5173670.
How big is JOHN G MUNSON?
JOHN G MUNSON is about 234 m long, 22 m on the beam, drawing 7.9 m.
Is JOHN G MUNSON on the Master's Mate Safety Initiative Network?
Not yet. If JOHN G MUNSON is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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