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.

Towing Vessel

ENDURANCE

MMSI 366797540 · Call sign WDF7523

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

55.9 m

Beam

12.3 m

Draft

4.5 m

Call sign

WDF7523

IMO

7528817

Official No.

589291

AIS reports

On the American registry, ENDURANCE is a 55.9-metre utility vessel. She carries a beam measuring 12.3 metres and a 4.5-metre draft. She broadcasts as MMSI 366797540, call sign WDF7523, IMO 7528817. Bring ENDURANCE aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.

Free forever · No credit card · for working boats

Built for boats that work — like ENDURANCE.

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 ENDURANCE 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 ENDURANCE 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 ENDURANCE and switch it all on

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

Claim free → unlock everything

About ENDURANCE

What kind of vessel is ENDURANCE?

ENDURANCE is a Towing Vessel flagged to United States of America.

What is ENDURANCE's MMSI?

ENDURANCE's MMSI is 366797540. Call sign WDF7523. IMO 7528817.

How big is ENDURANCE?

ENDURANCE is about 55.9 m long, 12.3 m on the beam, drawing 4.5 m.

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

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