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

GRUNDOON

U.S. Official No. 516580

Not yet on Master's Mate

Type

Research Vessel

Flag

USA

Length

15.2 m

Beam

3.7 m

Draft

3.2 m

First reported

Jun 2026

AIS reports

GRUNDOON is a boat under the American flag, 15.2 metres on deck. Below, she has a beam measuring 3.7 metres and a draft measuring 3.2 metres. On the registers she's U.S. official number 516580. GRUNDOON can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.

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Is GRUNDOON 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 GRUNDOON 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 GRUNDOON 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 GRUNDOON and switch it all on

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About GRUNDOON

What kind of vessel is GRUNDOON?

GRUNDOON is a Research Vessel flagged to United States of America.

What is GRUNDOON's U.S. Official No.?

GRUNDOON's U.S. Official No. is 516580.

How big is GRUNDOON?

GRUNDOON is about 15.2 m long, 3.7 m on the beam, drawing 3.2 m.

Is GRUNDOON on the Master's Mate Safety Initiative Network?

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