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 Sgt.William R.Button

MMSI 367370000 · Call sign WJLX

Not yet on Master's Mate

Flag

USA

Length

205 m

Call sign

WJLX

IMO

8302466

Official No.

678110

AIS reports

On the American registry, Usns Sgt.William R.Button is a 205-metre craft. Officially she's MMSI 367370000, call sign WJLX, IMO 8302466. Usns Sgt.William R.Button is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

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Is Usns Sgt.William R.Button 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.

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Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever Usns Sgt.William R.Button 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 Sgt.William R.Button 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 Sgt.William R.Button and switch it all on

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About Usns Sgt.William R.Button

What kind of vessel is Usns Sgt.William R.Button?

Usns Sgt.William R.Button is a vessel flagged to United States of America.

What is Usns Sgt.William R.Button's MMSI?

Usns Sgt.William R.Button's MMSI is 367370000. Call sign WJLX. IMO 8302466.

How big is Usns Sgt.William R.Button?

Usns Sgt.William R.Button is about 205 m long.

Is Usns Sgt.William R.Button on the Master's Mate Safety Initiative Network?

Not yet. If Usns Sgt.William R.Button is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).