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

MOONSTONE

United States of America · last seen 33°N 118°W · Jun 2026 · MMSI 338232742

Not yet on Master's Mate

Flag

USA

First reported

Jun 2026

Last reported

Jun 2026

AIS reports

MOONSTONE is an American craft. Look for MMSI 338232742. MOONSTONE is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

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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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Last known position · Jun 4, 2026

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Position

33.4602° N, 117.7016° W

Crossing off Southern California? 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

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

Joining the Safety Initiative Network doesn't just put MOONSTONE 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 MOONSTONE and switch it all on

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About MOONSTONE

What kind of vessel is MOONSTONE?

MOONSTONE is a vessel flagged to United States of America.

Where was MOONSTONE last seen?

MOONSTONE was last reported in off Southern California in Jun 2026 on public AIS.

What is MOONSTONE's MMSI?

MOONSTONE's MMSI is 338232742.

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

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