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

JOSEPH H THOMPSON JR

MMSI 366979050 · Call sign WAG3999

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

40.2 m

Beam

15.1 m

Draft

10.1 m

Call sign

WAG3999

Official No.

949095

AIS reports

An American service vessel, JOSEPH H THOMPSON JR measures 40.2 metres. JOSEPH H THOMPSON JR has a beam of 15.1 m and a 10.1 m draft. On the registers she's MMSI 366979050, call sign WAG3999. JOSEPH H THOMPSON JR is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.

Free forever · No credit card · for working boats

Built for boats that work — like JOSEPH H THOMPSON JR.

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 JOSEPH H THOMPSON JR 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 working boats

The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put JOSEPH H THOMPSON JR 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 JOSEPH H THOMPSON JR and switch it all on

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About JOSEPH H THOMPSON JR

What kind of vessel is JOSEPH H THOMPSON JR?

JOSEPH H THOMPSON JR is a Towing Vessel flagged to United States of America.

What is JOSEPH H THOMPSON JR's MMSI?

JOSEPH H THOMPSON JR's MMSI is 366979050. Call sign WAG3999.

How big is JOSEPH H THOMPSON JR?

JOSEPH H THOMPSON JR is about 40.2 m long, 15.1 m on the beam, drawing 10.1 m.

Is JOSEPH H THOMPSON JR on the Master's Mate Safety Initiative Network?

Not yet. If JOSEPH H THOMPSON JR is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).