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.
Tug
KOREA 401
MMSI 440139260 · Call sign 300KORE
Not yet on Master's MateType
Tug
Flag
KORDraft
3.5 m
Call sign
300KORE
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
On the South Korean registry, KOREA 401 is a tugboat. She's built with a 3.5 m draft. She's listed under MMSI 440139260, call sign 300KORE. Put KOREA 401 on the free Master's Mate Safety Initiative Network and keep the working fleet looking out for each other.
Free forever · No credit card · for working boats
Built for boats that work — like KOREA 401.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 19:39 UTC
Position
35.0987° N, 129.0721° E
Status
Under way (engine)
Speed
10.1 kn
Course
127°
Destination
@@@@@@@@@BL
Working 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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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put KOREA 401 on the map. It hands you the full bridge:
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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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 KOREA 401 and switch it all on
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About KOREA 401
What kind of vessel is KOREA 401?
KOREA 401 is a Tug flagged to South Korea.
Where was KOREA 401 last seen?
KOREA 401 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is KOREA 401's MMSI?
KOREA 401's MMSI is 440139260. Call sign 300KORE.
Is KOREA 401 on the Master's Mate Safety Initiative Network?
Not yet. If KOREA 401 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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