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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
YOUSHOUMARU
MMSI 431200632 · Call sign JH3502
Not yet on Master's MateType
Cargo
Flag
JPNLength
167 m
Beam
30 m
Draft
7.8 m
Call sign
JH3502
IMO
9263148
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
56
On the Japanese registry, YOUSHOUMARU is a 167-metre merchant ship. She has 30 metres in the beam and a draft measuring 7.8 metres. She's on record as MMSI 431200632, call sign JH3502, IMO 9263148. Join YOUSHOUMARU to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for commercial operators
Eyes on YOUSHOUMARU, 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
38.2718° N, 141.0125° 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 YOUSHOUMARU 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 YOUSHOUMARU and switch it all on
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About YOUSHOUMARU
What kind of vessel is YOUSHOUMARU?
YOUSHOUMARU is a Cargo flagged to Japan.
Where was YOUSHOUMARU last seen?
YOUSHOUMARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is YOUSHOUMARU's MMSI?
YOUSHOUMARU's MMSI is 431200632. Call sign JH3502. IMO 9263148.
How big is YOUSHOUMARU?
YOUSHOUMARU is about 167 m long, 30 m on the beam, drawing 7.8 m.
Is YOUSHOUMARU on the Master's Mate Safety Initiative Network?
Not yet. If YOUSHOUMARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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