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
MMI 603
U.S. Official No. 958894
Not yet on Master's MateType
Tank Barge
Flag
USALength
85.5 m
Beam
16.5 m
Draft
3.7 m
First reported
Jun 2026
AIS reports
1
MMI 603 is an American tank ship, 85.5 metres long. She has 16.5 metres in the beam and a draft of 3.7 m. Her papers read U.S. official number 958894. MMI 603 is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for commercial operators
Eyes on MMI 603, 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 MMI 603 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 MMI 603 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 MMI 603 and switch it all on
Free to join · nothing to install to start · cancel anytime
About MMI 603
What kind of vessel is MMI 603?
MMI 603 is a Tank Barge flagged to United States of America.
What is MMI 603's U.S. Official No.?
MMI 603's U.S. Official No. is 958894.
How big is MMI 603?
MMI 603 is about 85.5 m long, 16.5 m on the beam, drawing 3.7 m.
Is MMI 603 on the Master's Mate Safety Initiative Network?
Not yet. If MMI 603 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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