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.
UNSPECIFIED
HULL NO 6521
U.S. Official No. 506717
Not yet on Master's MateType
UNSPECIFIED
Flag
USALength
9.1 m
Beam
3 m
Draft
1.5 m
First reported
Jun 2026
AIS reports
1
Registered in the United States, HULL NO 6521 is a 9.1-metre craft. She carries a 3-metre beam and a 1.5 m draft. Her registration reads U.S. official number 506717. Bring HULL NO 6521 aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card
Is HULL NO 6521 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.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever HULL NO 6521 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
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put HULL NO 6521 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 HULL NO 6521 and switch it all on
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About HULL NO 6521
What kind of vessel is HULL NO 6521?
HULL NO 6521 is a UNSPECIFIED flagged to United States of America.
What is HULL NO 6521's U.S. Official No.?
HULL NO 6521's U.S. Official No. is 506717.
How big is HULL NO 6521?
HULL NO 6521 is about 9.1 m long, 3 m on the beam, drawing 1.5 m.
Is HULL NO 6521 on the Master's Mate Safety Initiative Network?
Not yet. If HULL NO 6521 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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