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.
Recreational
Gray Matter
MMSI 368064320 · Call sign WDK5379
Not yet on Master's MateType
Recreational
Flag
USALength
19.1 m
Beam
5.9 m
Draft
3.9 m
Call sign
WDK5379
Official No.
1235522
AIS reports
1
Gray Matter, a leisure boat listed on the the United States registry, measures 19.1 metres on deck. She carries a beam of 5.9 m and a 3.9 m draft. She's on record as MMSI 368064320, call sign WDK5379. Gray Matter can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.
Free forever · No credit card · for recreational captains
Keep Gray Matter looked after — even when you’re not aboard.
Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.
Look after her — claim free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Gray Matter 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 recreational captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Gray Matter 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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
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 Gray Matter and switch it all on
Free to join · nothing to install to start · cancel anytime
About Gray Matter
What kind of vessel is Gray Matter?
Gray Matter is a Recreational flagged to United States of America.
What is Gray Matter's MMSI?
Gray Matter's MMSI is 368064320. Call sign WDK5379.
How big is Gray Matter?
Gray Matter is about 19.1 m long, 5.9 m on the beam, drawing 3.9 m.
Is Gray Matter on the Master's Mate Safety Initiative Network?
Not yet. If Gray Matter is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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