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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.
Cargo
OUKAI MARU NO 5
MMSI 431016791 · Call sign JD4961
Not yet on Master's MateType
Cargo
Flag
JPNLength
75 m
Beam
12 m
Draft
4.2 m
Call sign
JD4961
IMO
9918365
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
74
OUKAI MARU NO 5 is a Japanese 75-metre merchant ship. She has a 12 m beam and a draft measuring 4.2 metres. Find her under MMSI 431016791, call sign JD4961, IMO 9918365. It's free to add OUKAI MARU NO 5 to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.
Free forever · No credit card · for commercial operators
Eyes on OUKAI MARU NO 5, 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
35.5174° N, 139.7488° E
Transiting the Sea of Japan? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put OUKAI MARU NO 5 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 OUKAI MARU NO 5 and switch it all on
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About OUKAI MARU NO 5
What kind of vessel is OUKAI MARU NO 5?
OUKAI MARU NO 5 is a Cargo flagged to Japan.
Where was OUKAI MARU NO 5 last seen?
OUKAI MARU NO 5 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is OUKAI MARU NO 5's MMSI?
OUKAI MARU NO 5's MMSI is 431016791. Call sign JD4961. IMO 9918365.
How big is OUKAI MARU NO 5?
OUKAI MARU NO 5 is about 75 m long, 12 m on the beam, drawing 4.2 m.
Is OUKAI MARU NO 5 on the Master's Mate Safety Initiative Network?
Not yet. If OUKAI MARU NO 5 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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