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
301 SEO JIN
MMSI 440703530 · Call sign 301
Not yet on Master's MateFlag
KORDraft
1 m
Call sign
301
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
63
301 SEO JIN is a South Korean boat. She has a draft of 1 m. She's listed under MMSI 440703530, call sign 301. It's free to add 301 SEO JIN to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.
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Is 301 SEO JIN 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.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 04:05 UTC
Position
35.1863° N, 129.5207° E
Status
Restricted manoeuvrability
Speed
0.1 kn
Course
57°
Crossing the Sea of Japan? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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Joining the Safety Initiative Network doesn't just put 301 SEO JIN 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 301 SEO JIN and switch it all on
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About 301 SEO JIN
What kind of vessel is 301 SEO JIN?
301 SEO JIN is a vessel flagged to South Korea.
Where was 301 SEO JIN last seen?
301 SEO JIN was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is 301 SEO JIN's MMSI?
301 SEO JIN's MMSI is 440703530. Call sign 301.
Is 301 SEO JIN on the Master's Mate Safety Initiative Network?
Not yet. If 301 SEO JIN is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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