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.

Towing Vessel

Leon Johnson

MMSI 366996680 · Call sign WDC2711

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

36.9 m

Beam

10.1 m

Draft

3.1 m

Call sign

WDC2711

Official No.

530133

AIS reports

Out of the United States, Leon Johnson is a 36.9-metre harbour workboat. She has a beam of 10.1 m and a draft of 3.1 m. Her papers read MMSI 366996680, call sign WDC2711. Leon Johnson is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

Free forever · No credit card · for working boats

Built for boats that work — like Leon Johnson.

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 Leon Johnson 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 Leon Johnson 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 Leon Johnson and switch it all on

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About Leon Johnson

What kind of vessel is Leon Johnson?

Leon Johnson is a Towing Vessel flagged to United States of America.

What is Leon Johnson's MMSI?

Leon Johnson's MMSI is 366996680. Call sign WDC2711.

How big is Leon Johnson?

Leon Johnson is about 36.9 m long, 10.1 m on the beam, drawing 3.1 m.

Is Leon Johnson on the Master's Mate Safety Initiative Network?

Not yet. If Leon Johnson is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).