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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 Dempsey
MMSI 367613790 · Call sign WDH4061
Not yet on Master's MateType
Towing Vessel
Flag
USALength
25.5 m
Beam
9.8 m
Draft
3.5 m
Call sign
WDH4061
Official No.
1251693
AIS reports
1
John Dempsey is an American harbour workboat — 25.5 metres overall. She has a beam measuring 9.8 metres and a draft of 3.5 m. She's listed under MMSI 367613790, call sign WDH4061. Add John Dempsey to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.
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Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
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Live AIS position · Jun 9, 2026 11:29 UTC
Position
29.7068° N, 95.0463° W
Status
Pushing ahead
Speed
0.0 kn
Course
95°
Destination
LAKE CHARLES
ETA
04-13 23:00 UTC
Working the Gulf of Mexico? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put John Dempsey 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.
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About John Dempsey
What kind of vessel is John Dempsey?
John Dempsey is a Towing Vessel flagged to United States of America.
Where was John Dempsey last seen?
John Dempsey was last reported in the Gulf of Mexico on public AIS.
What is John Dempsey's MMSI?
John Dempsey's MMSI is 367613790. Call sign WDH4061.
How big is John Dempsey?
John Dempsey is about 25.5 m long, 9.8 m on the beam, drawing 3.5 m.
Is John Dempsey on the Master's Mate Safety Initiative Network?
Not yet. If John Dempsey is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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