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.

Recreational

SEA LION II

U.S. Official No. 531095

Not yet on Master's Mate

Type

Recreational

Flag

USA

Length

8.7 m

Beam

3.4 m

Draft

1.6 m

First reported

Jun 2026

AIS reports

SEA LION II is an American weekend cruiser, 8.7 metres long. Below, she has a beam of 3.4 m and a draft of 1.6 m. Her papers read U.S. official number 531095. It's free to add SEA LION II to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.

Free forever · No credit card · for recreational captains

Keep SEA LION II looked after — even when you’re not aboard.

Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.

Look after her — claim free →

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

Wherever SEA LION II 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 recreational captains

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

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

Anchor Watch

GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.

Onboard Cameras

Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.

Weather & Routing

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

Worldwide Charts

Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.

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.

Distress Mesh

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

Hail Any Captain

A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.

Claim SEA LION II and switch it all on

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

Claim free → unlock everything

About SEA LION II

What kind of vessel is SEA LION II?

SEA LION II is a Recreational flagged to United States of America.

What is SEA LION II's U.S. Official No.?

SEA LION II's U.S. Official No. is 531095.

How big is SEA LION II?

SEA LION II is about 8.7 m long, 3.4 m on the beam, drawing 1.6 m.

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

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