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.
Towing Vessel
CBL 401 B
U.S. Official No. 593328
Not yet on Master's MateType
Towing Vessel
Flag
USALength
61 m
Beam
10.7 m
Draft
3.6 m
First reported
Jun 2026
AIS reports
1
Out of the United States, CBL 401 B is a 61-metre workboat. She carries a 10.7-metre beam and a 3.6 m draft. Look for U.S. official number 593328. It's free to add CBL 401 B to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.
Free forever · No credit card · for working boats
Built for boats that work — like CBL 401 B.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever CBL 401 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 working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put CBL 401 B on the map. It hands you the full bridge:
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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
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 CBL 401 B and switch it all on
Free to join · nothing to install to start · cancel anytime
About CBL 401 B
What kind of vessel is CBL 401 B?
CBL 401 B is a Towing Vessel flagged to United States of America.
What is CBL 401 B's U.S. Official No.?
CBL 401 B's U.S. Official No. is 593328.
How big is CBL 401 B?
CBL 401 B is about 61 m long, 10.7 m on the beam, drawing 3.6 m.
Is CBL 401 B on the Master's Mate Safety Initiative Network?
Not yet. If CBL 401 B is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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