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.
Passenger (Inspected)
WALTER J III
U.S. Official No. 511213
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
18.3 m
Beam
6.2 m
Draft
0.9 m
First reported
Jun 2026
AIS reports
1
An American passenger vessel, WALTER J III measures 18.3 metres. WALTER J III has a beam measuring 6.2 metres and a 0.9 m draft. Look for U.S. official number 511213. WALTER J III is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard WALTER J III safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever WALTER J III 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 passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put WALTER J III on the map. It hands you the full bridge:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
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.
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.
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 WALTER J III and switch it all on
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About WALTER J III
What kind of vessel is WALTER J III?
WALTER J III is a Passenger (Inspected) flagged to United States of America.
What is WALTER J III's U.S. Official No.?
WALTER J III's U.S. Official No. is 511213.
How big is WALTER J III?
WALTER J III is about 18.3 m long, 6.2 m on the beam, drawing 0.9 m.
Is WALTER J III on the Master's Mate Safety Initiative Network?
Not yet. If WALTER J III is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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