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.

Research Vessel

Marie Tharp

MMSI 368248130 · Call sign WDM8956

Not yet on Master's Mate

Type

Research Vessel

Flag

USA

Length

19.7 m

Beam

4.9 m

Draft

4.1 m

Call sign

WDM8956

Official No.

1101486

AIS reports

Marie Tharp, a boat hailing from the United States, measures 19.7 metres on deck. She carries a beam measuring 4.9 metres and a 4.1 m draft. On the registers she's MMSI 368248130, call sign WDM8956. The Master's Mate Safety Initiative Network welcomes Marie Tharp — free to join, cruiser-run, and always on watch.

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Is Marie Tharp your boat?

Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.

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

Joining the Safety Initiative Network doesn't just put Marie Tharp on the map. It hands you the full bridge:

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.

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.

Onboard Cameras

Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.

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.

Hail Any Captain

A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.

Claim Marie Tharp and switch it all on

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About Marie Tharp

What kind of vessel is Marie Tharp?

Marie Tharp is a Research Vessel flagged to United States of America.

What is Marie Tharp's MMSI?

Marie Tharp's MMSI is 368248130. Call sign WDM8956.

How big is Marie Tharp?

Marie Tharp is about 19.7 m long, 4.9 m on the beam, drawing 4.1 m.

Is Marie Tharp on the Master's Mate Safety Initiative Network?

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