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 (Uninspected)

Seal

MMSI 366968370 · Call sign WDB9031

Not yet on Master's Mate

Type

Passenger (Uninspected)

Flag

USA

Length

17.1 m

Beam

4.9 m

Draft

2.4 m

Call sign

WDB9031

Official No.

1147430

AIS reports

Seal, a passenger vessel listed on the the United States registry, measures 17.1 metres on deck. Seal has 4.9 metres in the beam and a 2.4 m draft. Look for MMSI 366968370, call sign WDB9031. Bring Seal aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.

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

Keep every soul aboard Seal 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 Seal 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 Seal 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 Seal and switch it all on

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

Claim free → unlock everything

About Seal

What kind of vessel is Seal?

Seal is a Passenger (Uninspected) flagged to United States of America.

What is Seal's MMSI?

Seal's MMSI is 366968370. Call sign WDB9031.

How big is Seal?

Seal is about 17.1 m long, 4.9 m on the beam, drawing 2.4 m.

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

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