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.
Cargo
12 TENYOMARU
MMSI 431004632 · Call sign JD3542
Not yet on Master's MateType
Cargo
Flag
JPNLength
80 m
Beam
14 m
Draft
4.7 m
Call sign
JD3542
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
27
12 TENYOMARU is a Japanese merchant vessel, measuring 80 metres. She carries a 14-metre beam and a 4.7 m draft. She's listed under MMSI 431004632, call sign JD3542. It's free to add 12 TENYOMARU 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 12 TENYOMARU, 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
Live AIS position · Jun 9, 2026 01:23 UTC
Position
35.3886° N, 139.6510° E
Status
Under way (engine)
Speed
0.0 kn
Course
216°
Transiting the Sea of Japan? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put 12 TENYOMARU 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 12 TENYOMARU and switch it all on
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About 12 TENYOMARU
What kind of vessel is 12 TENYOMARU?
12 TENYOMARU is a Cargo flagged to Japan.
Where was 12 TENYOMARU last seen?
12 TENYOMARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is 12 TENYOMARU's MMSI?
12 TENYOMARU's MMSI is 431004632. Call sign JD3542.
How big is 12 TENYOMARU?
12 TENYOMARU is about 80 m long, 14 m on the beam, drawing 4.7 m.
Is 12 TENYOMARU on the Master's Mate Safety Initiative Network?
Not yet. If 12 TENYOMARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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