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

MARIA J

MMSI 366898420 · Call sign WDB4441

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

19.2 m

Beam

6.7 m

Draft

2.6 m

Call sign

WDB4441

Official No.

535673

AIS reports

On the American registry, MARIA J is a 19.2-metre working craft. Below, she has a beam measuring 6.7 metres and a draft of 2.6 m. Her registration reads MMSI 366898420, call sign WDB4441. Claim MARIA J free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.

Free forever · No credit card · for working boats

Built for boats that work — like MARIA J.

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 MARIA J 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 MARIA J 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 MARIA J and switch it all on

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

Claim free → unlock everything

About MARIA J

What kind of vessel is MARIA J?

MARIA J is a Towing Vessel flagged to United States of America.

What is MARIA J's MMSI?

MARIA J's MMSI is 366898420. Call sign WDB4441.

How big is MARIA J?

MARIA J is about 19.2 m long, 6.7 m on the beam, drawing 2.6 m.

Is MARIA J on the Master's Mate Safety Initiative Network?

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