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.

Tank Barge

B. NO. 225

MMSI 366897940 · Call sign WDB4393

Not yet on Master's Mate

Type

Tank Barge

Flag

USA

Length

125.4 m

Beam

24.1 m

Draft

10.4 m

Call sign

WDB4393

Official No.

1139764

AIS reports

An American tank vessel, B. NO. 225 measures 125.4 metres. B. NO. 225 has a beam measuring 24.1 metres and a 10.4 m draft. On AIS she shows as MMSI 366897940, call sign WDB4393. B. NO. 225 is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

Free forever · No credit card · for commercial operators

Eyes on B. NO. 225, around the clock.

Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.

Put her on the dashboard — free →

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

Wherever B. NO. 225 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 commercial operators

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

Joining the Safety Initiative Network doesn't just put B. NO. 225 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.

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.

Worldwide Charts

Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.

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.

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 B. NO. 225 and switch it all on

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Claim free → unlock everything

About B. NO. 225

What kind of vessel is B. NO. 225?

B. NO. 225 is a Tank Barge flagged to United States of America.

What is B. NO. 225's MMSI?

B. NO. 225's MMSI is 366897940. Call sign WDB4393.

How big is B. NO. 225?

B. NO. 225 is about 125.4 m long, 24.1 m on the beam, drawing 10.4 m.

Is B. NO. 225 on the Master's Mate Safety Initiative Network?

Not yet. If B. NO. 225 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).