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)

CAPT. JOHN & SON IV

MMSI 366944460 · Call sign WAC3743

Not yet on Master's Mate

Type

Passenger (Inspected)

Flag

USA

Length

26.2 m

Beam

7.6 m

Draft

2.5 m

Call sign

WAC3743

Official No.

683977

AIS reports

On the American registry, CAPT. JOHN & SON IV is a 26.2-metre passenger ship. Her hull carries a beam measuring 7.6 metres and a draft measuring 2.5 metres. Officially she's MMSI 366944460, call sign WAC3743. CAPT. JOHN & SON IV can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.

Free forever · No credit card · for passenger & charter operators

Keep every soul aboard CAPT. JOHN & SON IV 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 CAPT. JOHN & SON IV 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 CAPT. JOHN & SON IV 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 CAPT. JOHN & SON IV and switch it all on

Free to join · nothing to install to start · cancel anytime

Claim free → unlock everything

About CAPT. JOHN & SON IV

What kind of vessel is CAPT. JOHN & SON IV?

CAPT. JOHN & SON IV is a Passenger (Inspected) flagged to United States of America.

What is CAPT. JOHN & SON IV's MMSI?

CAPT. JOHN & SON IV's MMSI is 366944460. Call sign WAC3743.

How big is CAPT. JOHN & SON IV?

CAPT. JOHN & SON IV is about 26.2 m long, 7.6 m on the beam, drawing 2.5 m.

Is CAPT. JOHN & SON IV on the Master's Mate Safety Initiative Network?

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