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
GBL 4630
U.S. Official No. 1257497
Not yet on Master's MateType
Tank Barge
Flag
USALength
90.7 m
Beam
16.5 m
Draft
3.7 m
First reported
Jun 2026
AIS reports
1
GBL 4630, a tanker flying the flag of the United States, measures 90.7 metres on deck. She carries a beam of 16.5 m and a 3.7 m draft. Her registration reads U.S. official number 1257497. GBL 4630 can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
Free forever · No credit card · for commercial operators
Eyes on GBL 4630, 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 GBL 4630 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 GBL 4630 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 GBL 4630 and switch it all on
Free to join · nothing to install to start · cancel anytime
About GBL 4630
What kind of vessel is GBL 4630?
GBL 4630 is a Tank Barge flagged to United States of America.
What is GBL 4630's U.S. Official No.?
GBL 4630's U.S. Official No. is 1257497.
How big is GBL 4630?
GBL 4630 is about 90.7 m long, 16.5 m on the beam, drawing 3.7 m.
Is GBL 4630 on the Master's Mate Safety Initiative Network?
Not yet. If GBL 4630 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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