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)

Marr-B III

MMSI 366841710 · Call sign WDA7290

Not yet on Master's Mate

Type

Passenger (Inspected)

Flag

USA

Length

12.6 m

Beam

4.3 m

Draft

1.9 m

Call sign

WDA7290

Official No.

588354

AIS reports

Marr-B III is an American passenger ferry, 12.6 metres long. She has a beam of 4.3 m and a draft of 1.9 m. Look for MMSI 366841710, call sign WDA7290. Add Marr-B III to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.

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

Keep every soul aboard Marr-B III 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 Marr-B III 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 Marr-B III 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 Marr-B III and switch it all on

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

Claim free → unlock everything

About Marr-B III

What kind of vessel is Marr-B III?

Marr-B III is a Passenger (Inspected) flagged to United States of America.

What is Marr-B III's MMSI?

Marr-B III's MMSI is 366841710. Call sign WDA7290.

How big is Marr-B III?

Marr-B III is about 12.6 m long, 4.3 m on the beam, drawing 1.9 m.

Is Marr-B III on the Master's Mate Safety Initiative Network?

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