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.

Offshore Supply Vessel

Diamond Jim

MMSI 366875350 · Call sign WDB2385

Not yet on Master's Mate

Type

Offshore Supply Vessel

Flag

USA

Length

51.2 m

Beam

22.9 m

Draft

3.8 m

Call sign

WDB2385

Official No.

1120590

AIS reports

Diamond Jim flies the American flag — a 51.2-metre work boat. She has a beam measuring 22.9 metres and a draft measuring 3.8 metres. On the registers she's MMSI 366875350, call sign WDB2385. Diamond Jim is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

Free forever · No credit card · for working boats

Built for boats that work — like Diamond Jim.

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 Diamond Jim 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 Diamond Jim 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 Diamond Jim and switch it all on

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

Claim free → unlock everything

About Diamond Jim

What kind of vessel is Diamond Jim?

Diamond Jim is a Offshore Supply Vessel flagged to United States of America.

What is Diamond Jim's MMSI?

Diamond Jim's MMSI is 366875350. Call sign WDB2385.

How big is Diamond Jim?

Diamond Jim is about 51.2 m long, 22.9 m on the beam, drawing 3.8 m.

Is Diamond Jim on the Master's Mate Safety Initiative Network?

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