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.

Passenger (Inspected)

Relentless

MMSI 366547000 · Call sign WDL2481

Not yet on Master's Mate

Type

Passenger (Inspected)

Flag

USA

Length

33.3 m

Beam

9.4 m

Draft

1.9 m

Call sign

WDL2481

IMO

8654560

Official No.

947538

AIS reports

Relentless, an American excursion vessel, measures 33.3 metres on deck. She carries a beam measuring 9.4 metres and a 1.9-metre draft. Her papers read MMSI 366547000, call sign WDL2481, IMO 8654560. Sign Relentless up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.

Free forever · No credit card · for passenger & charter operators

Keep every soul aboard Relentless safe.

Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.

Switch on the safety stack — free →

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

Wherever Relentless 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 passenger & charter operators

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

Joining the Safety Initiative Network doesn't just put Relentless on the map. It hands you the full bridge:

Distress Mesh

Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.

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.

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.

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 Relentless and switch it all on

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

Claim free → unlock everything

About Relentless

What kind of vessel is Relentless?

Relentless is a Passenger (Inspected) flagged to United States of America.

What is Relentless's MMSI?

Relentless's MMSI is 366547000. Call sign WDL2481. IMO 8654560.

How big is Relentless?

Relentless is about 33.3 m long, 9.4 m on the beam, drawing 1.9 m.

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

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