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.

UNSPECIFIED

BIG JOHN

U.S. Official No. 296810

Not yet on Master's Mate

Type

UNSPECIFIED

Flag

USA

Length

18.3 m

Beam

6.1 m

Draft

1.4 m

First reported

Jun 2026

AIS reports

BIG JOHN is an American vessel, 18.3 metres overall. BIG JOHN has 6.1 metres in the beam and a 1.4-metre draft. She's listed under U.S. official number 296810. BIG JOHN can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.

Free forever · No credit card

Is BIG JOHN 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.

Claim this boat — free →

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

Wherever BIG JOHN 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

The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put BIG JOHN 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 BIG JOHN and switch it all on

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

Claim free → unlock everything

About BIG JOHN

What kind of vessel is BIG JOHN?

BIG JOHN is a UNSPECIFIED flagged to United States of America.

What is BIG JOHN's U.S. Official No.?

BIG JOHN's U.S. Official No. is 296810.

How big is BIG JOHN?

BIG JOHN is about 18.3 m long, 6.1 m on the beam, drawing 1.4 m.

Is BIG JOHN on the Master's Mate Safety Initiative Network?

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