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.
Tank Barge
DBL 257B
U.S. Official No. 1039469
Not yet on Master's MateType
Tank Barge
Flag
USALength
45.7 m
Beam
16.5 m
Draft
3.7 m
First reported
Jun 2026
AIS reports
1
An American tank vessel, DBL 257B measures 45.7 metres. DBL 257B has a beam measuring 16.5 metres and a 3.7-metre draft. She's listed under U.S. official number 1039469. It's free to add DBL 257B 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 commercial operators
Eyes on DBL 257B, 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 DBL 257B 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 DBL 257B 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 DBL 257B and switch it all on
Free to join · nothing to install to start · cancel anytime
About DBL 257B
What kind of vessel is DBL 257B?
DBL 257B is a Tank Barge flagged to United States of America.
What is DBL 257B's U.S. Official No.?
DBL 257B's U.S. Official No. is 1039469.
How big is DBL 257B?
DBL 257B is about 45.7 m long, 16.5 m on the beam, drawing 3.7 m.
Is DBL 257B on the Master's Mate Safety Initiative Network?
Not yet. If DBL 257B is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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