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.

Commercial Fishing Vessel

MARY B

U.S. Official No. 533501

Not yet on Master's Mate

Type

Commercial Fishing Vessel

Flag

USA

Length

14.2 m

Beam

5.1 m

Draft

2 m

First reported

Jun 2026

AIS reports

MARY B is an American fishing trawler — 14.2 metres overall. Below, she has 5.1 metres in the beam and a draft of 2 m. Officially she's U.S. official number 533501. Sign MARY B up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.

Free forever · No credit card · for working captains

Know where the fleet is. Get MARY B home safe.

Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.

Keep the fleet in sight — free →

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

Wherever MARY B 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 captains

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

Joining the Safety Initiative Network doesn't just put MARY B on the map. It hands you the full bridge:

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.

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.

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 MARY B and switch it all on

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

Claim free → unlock everything

About MARY B

What kind of vessel is MARY B?

MARY B is a Commercial Fishing Vessel flagged to United States of America.

What is MARY B's U.S. Official No.?

MARY B's U.S. Official No. is 533501.

How big is MARY B?

MARY B is about 14.2 m long, 5.1 m on the beam, drawing 2 m.

Is MARY B on the Master's Mate Safety Initiative Network?

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