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
YU YI
MMSI 477300900 · Call sign VRNF4
Not yet on Master's MateType
Tanker
Flag
HKGLength
151 m
Beam
23 m
Draft
6.6 m
Call sign
VRNF4
IMO
9675925
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
87
Out of Hong Kong, YU YI is a 151-metre tanker. Her hull carries a beam of 23 m and a draft measuring 6.6 metres. On AIS she appears as MMSI 477300900, call sign VRNF4, IMO 9675925. Add YU YI to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.
Free forever · No credit card · for commercial operators
Eyes on YU YI, 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
1.2149° N, 103.8249° E
Transiting the Strait of Malacca? 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 YU YI 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 YU YI and switch it all on
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About YU YI
What kind of vessel is YU YI?
YU YI is a Tanker flagged to Hong Kong S.A.R..
Where was YU YI last seen?
YU YI was last reported in the Strait of Malacca in Jun 2026 on public AIS.
What is YU YI's MMSI?
YU YI's MMSI is 477300900. Call sign VRNF4. IMO 9675925.
How big is YU YI?
YU YI is about 151 m long, 23 m on the beam, drawing 6.6 m.
Is YU YI on the Master's Mate Safety Initiative Network?
Not yet. If YU YI is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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