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
YUYO MARU
MMSI 431501743 · Call sign JL6694
Not yet on Master's MateType
Tanker
Flag
JPNLength
96 m
Beam
15 m
Draft
5.5 m
Call sign
JL6694
IMO
9266803
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
37
A Japanese tank vessel, YUYO MARU measures 96 metres. YUYO MARU has a 15 m beam and a 5.5 m draft. She's listed under MMSI 431501743, call sign JL6694, IMO 9266803. Sign YUYO MARU up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
Free forever · No credit card · for commercial operators
Eyes on YUYO MARU, 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 3, 2026
Position
35.4837° N, 139.8998° 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.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put YUYO MARU 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 YUYO MARU and switch it all on
Free to join · nothing to install to start · cancel anytime
About YUYO MARU
What kind of vessel is YUYO MARU?
YUYO MARU is a Tanker flagged to Japan.
Where was YUYO MARU last seen?
YUYO MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is YUYO MARU's MMSI?
YUYO MARU's MMSI is 431501743. Call sign JL6694. IMO 9266803.
How big is YUYO MARU?
YUYO MARU is about 96 m long, 15 m on the beam, drawing 5.5 m.
Is YUYO MARU on the Master's Mate Safety Initiative Network?
Not yet. If YUYO MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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