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
SUNJIN NO.303
MMSI 440406750 · Call sign USR2448
Not yet on Master's MateFlag
KORLength
29 m
Beam
10 m
Call sign
USR2448
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
SUNJIN NO.303 is a vessel flying the flag of South Korea, 29 metres overall. SUNJIN NO.303 has a 10-metre beam. On the registers she's MMSI 440406750, call sign USR2448. SUNJIN NO.303 is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
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Is SUNJIN NO.303 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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Last known position · Jun 4, 2026
Position
35.1085° N, 129.0669° E
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 SUNJIN NO.303 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 SUNJIN NO.303 and switch it all on
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About SUNJIN NO.303
What kind of vessel is SUNJIN NO.303?
SUNJIN NO.303 is a vessel flagged to South Korea.
Where was SUNJIN NO.303 last seen?
SUNJIN NO.303 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SUNJIN NO.303's MMSI?
SUNJIN NO.303's MMSI is 440406750. Call sign USR2448.
How big is SUNJIN NO.303?
SUNJIN NO.303 is about 29 m long, 10 m on the beam.
Is SUNJIN NO.303 on the Master's Mate Safety Initiative Network?
Not yet. If SUNJIN NO.303 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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