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.

Commercial Fishing Vessel

SEA CHALLENGER

MMSI 366815930 · Call sign WDA5052

Not yet on Master's Mate

Type

Commercial Fishing Vessel

Flag

USA

Length

28 m

Beam

8.2 m

Draft

4.1 m

Call sign

WDA5052

IMO

8969850

Official No.

1112875

AIS reports

Registered in the United States, SEA CHALLENGER is a 28-metre commercial fishing vessel. She's built with a 8.2-metre beam and a 4.1 m draft. She broadcasts as MMSI 366815930, call sign WDA5052, IMO 8969850. Working boats like SEA CHALLENGER spend long hours offshore — the free Master's Mate Safety Initiative Network puts a distress mesh and a watching fleet within reach.

Free forever · No credit card · for working captains

Know where the fleet is. Get SEA CHALLENGER home safe.

Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.

Keep the fleet in sight — free →

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

Wherever SEA CHALLENGER 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 captains

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

Joining the Safety Initiative Network doesn't just put SEA CHALLENGER 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.

Weather & Routing

GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.

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.

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 SEA CHALLENGER and switch it all on

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

Claim free → unlock everything

About SEA CHALLENGER

What kind of vessel is SEA CHALLENGER?

SEA CHALLENGER is a Commercial Fishing Vessel flagged to United States of America.

What is SEA CHALLENGER's MMSI?

SEA CHALLENGER's MMSI is 366815930. Call sign WDA5052. IMO 8969850.

How big is SEA CHALLENGER?

SEA CHALLENGER is about 28 m long, 8.2 m on the beam, drawing 4.1 m.

Is SEA CHALLENGER on the Master's Mate Safety Initiative Network?

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