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.
Freight Ship
HARRY B
U.S. Official No. 237156
Not yet on Master's MateType
Freight Ship
Flag
USALength
11.9 m
Beam
3.2 m
Draft
0.9 m
First reported
Jun 2026
AIS reports
1
HARRY B, a cargo vessel flying the flag of the United States, measures 11.9 metres on deck. HARRY B has 3.2 metres in the beam and a 0.9-metre draft. She's listed under U.S. official number 237156. Put HARRY B on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
Free forever · No credit card · for commercial operators
Eyes on HARRY B, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever HARRY B 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 commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put HARRY B on the map. It hands you the full bridge:
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
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 HARRY B and switch it all on
Free to join · nothing to install to start · cancel anytime
About HARRY B
What kind of vessel is HARRY B?
HARRY B is a Freight Ship flagged to United States of America.
What is HARRY B's U.S. Official No.?
HARRY B's U.S. Official No. is 237156.
How big is HARRY B?
HARRY B is about 11.9 m long, 3.2 m on the beam, drawing 0.9 m.
Is HARRY B on the Master's Mate Safety Initiative Network?
Not yet. If HARRY B is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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