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 LION

MMSI 367354020 · Call sign WDE4499

Not yet on Master's Mate

Type

Commercial Fishing Vessel

Flag

USA

Length

19.2 m

Beam

6.1 m

Draft

2.4 m

Call sign

WDE4499

Official No.

699289

AIS reports

SEA LION, an American fishing trawler, measures 19.2 metres on deck. She has a 6.1-metre beam and a draft measuring 2.4 metres. She broadcasts as MMSI 367354020, call sign WDE4499. Sign SEA LION 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 working captains

Know where the fleet is. Get SEA LION 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 LION 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 LION 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 LION and switch it all on

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

Claim free → unlock everything

About SEA LION

What kind of vessel is SEA LION?

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

What is SEA LION's MMSI?

SEA LION's MMSI is 367354020. Call sign WDE4499.

How big is SEA LION?

SEA LION is about 19.2 m long, 6.1 m on the beam, drawing 2.4 m.

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

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