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 Walter S. Diehl
MMSI 367222000
Not yet on Master's MateFlag
USALength
206.5 m
IMO
8511495
AIS reports
2
Registered in the United States, USNS Walter S. Diehl is a 206.5-metre boat. On AIS she appears as MMSI 367222000, IMO 8511495. USNS Walter S. Diehl belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.
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Is USNS Walter S. Diehl 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 Walter S. Diehl roams, you're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put USNS Walter S. Diehl 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 Walter S. Diehl and switch it all on
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About USNS Walter S. Diehl
What kind of vessel is USNS Walter S. Diehl?
USNS Walter S. Diehl is a vessel flagged to United States of America.
What is USNS Walter S. Diehl's MMSI?
USNS Walter S. Diehl's MMSI is 367222000. IMO 8511495.
How big is USNS Walter S. Diehl?
USNS Walter S. Diehl is about 206.5 m long.
Is USNS Walter S. Diehl on the Master's Mate Safety Initiative Network?
Not yet. If USNS Walter S. Diehl is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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