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

Dolphin

MMSI 366947760 · Call sign WDB7769

Not yet on Master's Mate

Type

Offshore Supply Vessel

Flag

USA

Length

21.8 m

Beam

9.8 m

Draft

2.1 m

Call sign

WDB7769

IMO

8037695

Official No.

623965

AIS reports

Dolphin is an utility vessel wearing American colours, 21.8 metres overall. She's built with a 9.8-metre beam and a 2.1-metre draft. On AIS she appears as MMSI 366947760, call sign WDB7769, IMO 8037695. Dolphin 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 working boats

Built for boats that work — like Dolphin.

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 Dolphin 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 Dolphin 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 Dolphin and switch it all on

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

Claim free → unlock everything

About Dolphin

What kind of vessel is Dolphin?

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

What is Dolphin's MMSI?

Dolphin's MMSI is 366947760. Call sign WDB7769. IMO 8037695.

How big is Dolphin?

Dolphin is about 21.8 m long, 9.8 m on the beam, drawing 2.1 m.

Is Dolphin on the Master's Mate Safety Initiative Network?

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