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.

Oil Recovery

OSRB-4

MMSI 368033690 · Call sign WDK2240

Not yet on Master's Mate

Type

Oil Recovery

Flag

USA

Length

116.3 m

Beam

29.3 m

Draft

8.5 m

Call sign

WDK2240

Official No.

1281896

AIS reports

On the American registry, OSRB-4 is an 116.3-metre commercial vessel. She carries a beam of 29.3 m and a 8.5 m draft. She's on record as MMSI 368033690, call sign WDK2240. OSRB-4 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 · for commercial operators

Eyes on OSRB-4, 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 OSRB-4 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 OSRB-4 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 OSRB-4 and switch it all on

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

Claim free → unlock everything

About OSRB-4

What kind of vessel is OSRB-4?

OSRB-4 is a Oil Recovery flagged to United States of America.

What is OSRB-4's MMSI?

OSRB-4's MMSI is 368033690. Call sign WDK2240.

How big is OSRB-4?

OSRB-4 is about 116.3 m long, 29.3 m on the beam, drawing 8.5 m.

Is OSRB-4 on the Master's Mate Safety Initiative Network?

Not yet. If OSRB-4 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).