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.
Passenger (Inspected)
Moonstone
MMSI 367310580 · Call sign WDJ9109
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
14.6 m
Beam
4 m
Draft
1.9 m
Call sign
WDJ9109
Official No.
921713
AIS reports
2
On the American registry, Moonstone is a 14.6-metre ferry. She's built with a beam of 4 m and a 1.9-metre draft. Her registration reads MMSI 367310580, call sign WDJ9109. Claim Moonstone free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Moonstone safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Moonstone roams, 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 · for passenger & charter operators
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:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
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
Free to join · nothing to install to start · cancel anytime
About Moonstone
What kind of vessel is Moonstone?
Moonstone is a Passenger (Inspected) flagged to United States of America.
What is Moonstone's MMSI?
Moonstone's MMSI is 367310580. Call sign WDJ9109.
How big is Moonstone?
Moonstone is about 14.6 m long, 4 m on the beam, drawing 1.9 m.
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).
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