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
TENSHO
MMSI 431009101 · Call sign JD4153
Not yet on Master's MateType
Cargo
Flag
JPNLength
62 m
Beam
13 m
Draft
5 m
Call sign
JD4153
IMO
9810018
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
TENSHO is a cargo vessel sailing under the Japanese flag, 62 metres overall. She carries a beam measuring 13 metres and a 5-metre draft. Find her under MMSI 431009101, call sign JD4153, IMO 9810018. Bring TENSHO aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card · for commercial operators
Eyes on TENSHO, 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
34.1342° N, 135.0809° 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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Joining the Safety Initiative Network doesn't just put TENSHO 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 TENSHO and switch it all on
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About TENSHO
What kind of vessel is TENSHO?
TENSHO is a Cargo flagged to Japan.
Where was TENSHO last seen?
TENSHO was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is TENSHO's MMSI?
TENSHO's MMSI is 431009101. Call sign JD4153. IMO 9810018.
How big is TENSHO?
TENSHO is about 62 m long, 13 m on the beam, drawing 5 m.
Is TENSHO on the Master's Mate Safety Initiative Network?
Not yet. If TENSHO is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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