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

Island Heiress

MMSI 366811000 · Call sign WDH9165

Not yet on Master's Mate

Type

Research Vessel

Flag

USA

Length

54.8 m

Beam

12.2 m

Draft

4.4 m

Call sign

WDH9165

IMO

8207678

Official No.

653208

AIS reports

Island Heiress flies the American flag — a 54.8-metre vessel. Her hull carries a 12.2 m beam and a draft of 4.4 m. On the registers she's MMSI 366811000, call sign WDH9165, IMO 8207678. Island Heiress belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.

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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 Island Heiress 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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Joining the Safety Initiative Network doesn't just put Island Heiress 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.

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About Island Heiress

What kind of vessel is Island Heiress?

Island Heiress is a Research Vessel flagged to United States of America.

What is Island Heiress's MMSI?

Island Heiress's MMSI is 366811000. Call sign WDH9165. IMO 8207678.

How big is Island Heiress?

Island Heiress is about 54.8 m long, 12.2 m on the beam, drawing 4.4 m.

Is Island Heiress on the Master's Mate Safety Initiative Network?

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