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.

Vessel

HMAS Leeuwin

MMSI 503177000

Not yet on Master's Mate

Flag

AUS

Length

71.2 m

IMO

9151773

AIS reports

HMAS Leeuwin is an Australian vessel, 71.2 metres from stem to stern. Her registration reads MMSI 503177000, IMO 9151773. HMAS Leeuwin is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.

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Is HMAS Leeuwin 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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Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever HMAS Leeuwin 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 HMAS Leeuwin 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 HMAS Leeuwin and switch it all on

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About HMAS Leeuwin

What kind of vessel is HMAS Leeuwin?

HMAS Leeuwin is a vessel flagged to Ashmore and Cartier Islands.

What is HMAS Leeuwin's MMSI?

HMAS Leeuwin's MMSI is 503177000. IMO 9151773.

How big is HMAS Leeuwin?

HMAS Leeuwin is about 71.2 m long.

Is HMAS Leeuwin on the Master's Mate Safety Initiative Network?

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