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

CAPT JOHN C.

MMSI 366770560 · Call sign WCZ4499

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

14.4 m

Beam

6.1 m

Draft

2.3 m

Call sign

WCZ4499

Official No.

644364

AIS reports

On the American registry, CAPT JOHN C. is a 14.4-metre utility boat. CAPT JOHN C. has a 6.1-metre beam and a 2.3-metre draft. Her registration reads MMSI 366770560, call sign WCZ4499. CAPT JOHN C. earns her keep on the water; the free Master's Mate Safety Initiative Network keeps a watching fleet and a distress mesh close at hand.

Free forever · No credit card · for working boats

Built for boats that work — like CAPT JOHN C..

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 CAPT JOHN C. 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 CAPT JOHN C. 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 CAPT JOHN C. and switch it all on

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Claim free → unlock everything

About CAPT JOHN C.

What kind of vessel is CAPT JOHN C.?

CAPT JOHN C. is a Towing Vessel flagged to United States of America.

What is CAPT JOHN C.'s MMSI?

CAPT JOHN C.'s MMSI is 366770560. Call sign WCZ4499.

How big is CAPT JOHN C.?

CAPT JOHN C. is about 14.4 m long, 6.1 m on the beam, drawing 2.3 m.

Is CAPT JOHN C. on the Master's Mate Safety Initiative Network?

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