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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
YOSHU NO.1
MMSI 431016434 · Call sign JD4896
Not yet on Master's MateType
Cargo
Flag
JPNLength
135 m
Beam
20 m
Draft
6.1 m
Call sign
JD4896
IMO
9902354
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
21
On the Japanese registry, YOSHU NO.1 is a 135-metre merchant vessel. She carries a beam of 20 m and a 6.1 m draft. She's on record as MMSI 431016434, call sign JD4896, IMO 9902354. YOSHU NO.1 can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
Free forever · No credit card · for commercial operators
Eyes on YOSHU NO.1, 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
35.4134° N, 139.6937° 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.
Free with your claim · for commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put YOSHU NO.1 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 YOSHU NO.1 and switch it all on
Free to join · nothing to install to start · cancel anytime
About YOSHU NO.1
What kind of vessel is YOSHU NO.1?
YOSHU NO.1 is a Cargo flagged to Japan.
Where was YOSHU NO.1 last seen?
YOSHU NO.1 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is YOSHU NO.1's MMSI?
YOSHU NO.1's MMSI is 431016434. Call sign JD4896. IMO 9902354.
How big is YOSHU NO.1?
YOSHU NO.1 is about 135 m long, 20 m on the beam, drawing 6.1 m.
Is YOSHU NO.1 on the Master's Mate Safety Initiative Network?
Not yet. If YOSHU NO.1 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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