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.
Vessel
USNS John Ericsson
MMSI 367221000
Not yet on Master's MateFlag
USALength
198.1 m
IMO
8511512
AIS reports
1
USNS John Ericsson is an American boat, measuring 198.1 metres. On AIS she shows as MMSI 367221000, IMO 8511512. Give USNS John Ericsson the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
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Is USNS John Ericsson your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever USNS John Ericsson 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
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put USNS John Ericsson on the map. It hands you the full bridge:
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.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
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.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim USNS John Ericsson and switch it all on
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About USNS John Ericsson
What kind of vessel is USNS John Ericsson?
USNS John Ericsson is a vessel flagged to United States of America.
What is USNS John Ericsson's MMSI?
USNS John Ericsson's MMSI is 367221000. IMO 8511512.
How big is USNS John Ericsson?
USNS John Ericsson is about 198.1 m long.
Is USNS John Ericsson on the Master's Mate Safety Initiative Network?
Not yet. If USNS John Ericsson is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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