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.
Tanker
HYEON.SUNG
MMSI 440129160 · Call sign 970912
Not yet on Master's MateType
Tanker
Flag
KORLength
37 m
Beam
7 m
Draft
3.3 m
Call sign
970912
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
2
Registered in South Korea, HYEON.SUNG is a 37-metre tank ship. She carries a 7-metre beam and a 3.3 m draft. Find her under MMSI 440129160, call sign 970912. The Master's Mate Safety Initiative Network welcomes HYEON.SUNG — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for commercial operators
Eyes on HYEON.SUNG, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 4, 2026
Position
35.0983° N, 129.0435° E
Transiting 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.
Free with your claim · for commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put HYEON.SUNG on the map. It hands you the full bridge:
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
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 HYEON.SUNG and switch it all on
Free to join · nothing to install to start · cancel anytime
About HYEON.SUNG
What kind of vessel is HYEON.SUNG?
HYEON.SUNG is a Tanker flagged to South Korea.
Where was HYEON.SUNG last seen?
HYEON.SUNG was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is HYEON.SUNG's MMSI?
HYEON.SUNG's MMSI is 440129160. Call sign 970912.
How big is HYEON.SUNG?
HYEON.SUNG is about 37 m long, 7 m on the beam, drawing 3.3 m.
Is HYEON.SUNG on the Master's Mate Safety Initiative Network?
Not yet. If HYEON.SUNG is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.