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.
Offshore Supply Vessel
AQUAMARINE 504
U.S. Official No. 596866
Not yet on Master's MateType
Offshore Supply Vessel
Flag
USALength
49.5 m
Beam
12.3 m
Draft
4.5 m
First reported
Jun 2026
AIS reports
1
AQUAMARINE 504 is a working craft flagged in the United States, 49.5 metres LOA. Her hull carries a 12.3-metre beam and a draft of 4.5 m. Officially she's U.S. official number 596866. Join AQUAMARINE 504 to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for working boats
Built for boats that work — like AQUAMARINE 504.
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 AQUAMARINE 504 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 AQUAMARINE 504 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 AQUAMARINE 504 and switch it all on
Free to join · nothing to install to start · cancel anytime
About AQUAMARINE 504
What kind of vessel is AQUAMARINE 504?
AQUAMARINE 504 is a Offshore Supply Vessel flagged to United States of America.
What is AQUAMARINE 504's U.S. Official No.?
AQUAMARINE 504's U.S. Official No. is 596866.
How big is AQUAMARINE 504?
AQUAMARINE 504 is about 49.5 m long, 12.3 m on the beam, drawing 4.5 m.
Is AQUAMARINE 504 on the Master's Mate Safety Initiative Network?
Not yet. If AQUAMARINE 504 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.