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.

Vessel

Seiyo Explorer

MMSI 370166000

Not yet on Master's Mate

Flag

PAN

Length

153 m

IMO

9135523

AIS reports

Seiyo Explorer is a Panamanian vessel, measuring 153 metres. On the registers she's MMSI 370166000, IMO 9135523. Claim Seiyo Explorer free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.

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Is Seiyo Explorer your boat?

Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.

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

Wherever Seiyo Explorer 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

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

Joining the Safety Initiative Network doesn't just put Seiyo Explorer 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.

Worldwide Charts

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

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.

Onboard Cameras

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

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.

Hail Any Captain

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

Claim Seiyo Explorer and switch it all on

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About Seiyo Explorer

What kind of vessel is Seiyo Explorer?

Seiyo Explorer is a vessel flagged to Panama.

What is Seiyo Explorer's MMSI?

Seiyo Explorer's MMSI is 370166000. IMO 9135523.

How big is Seiyo Explorer?

Seiyo Explorer is about 153 m long.

Is Seiyo Explorer on the Master's Mate Safety Initiative Network?

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