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
HMS 320
U.S. Official No. 273940
Not yet on Master's MateType
Tank Barge
Flag
USALength
88.5 m
Beam
16 m
Draft
3.9 m
First reported
Jun 2026
AIS reports
1
HMS 320 is a tanker flying the American flag, 88.5 metres overall. She carries a beam measuring 16 metres and a 3.9-metre draft. She's listed under U.S. official number 273940. Put HMS 320 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 HMS 320, 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 HMS 320 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 HMS 320 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 HMS 320 and switch it all on
Free to join · nothing to install to start · cancel anytime
About HMS 320
What kind of vessel is HMS 320?
HMS 320 is a Tank Barge flagged to United States of America.
What is HMS 320's U.S. Official No.?
HMS 320's U.S. Official No. is 273940.
How big is HMS 320?
HMS 320 is about 88.5 m long, 16 m on the beam, drawing 3.9 m.
Is HMS 320 on the Master's Mate Safety Initiative Network?
Not yet. If HMS 320 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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