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
RYUSHOU
Cargo · last seen 35°N 135°E · Jun 2026 · MMSI 431006908 · Call sign JD3916
Not yet on Master's MateType
Cargo
Length
70 m
Beam
12 m
Draft
3.5 m
Call sign
JD3916
IMO
9784219
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
6
RYUSHOU is a merchant vessel, measuring 70 metres. RYUSHOU has a 12-metre beam and a 3.5 m draft. On the registers she's MMSI 431006908, call sign JD3916, IMO 9784219. Bring RYUSHOU 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 RYUSHOU, 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 15, 2026 10:54 UTC
Position
34.6684° N, 135.4489° E
Status
Moored
Speed
0.0 kn
Course
175°
Destination
JP OSA H
ETA
06-15 09:00 UTC
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 RYUSHOU 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 RYUSHOU and switch it all on
Free to join · nothing to install to start · cancel anytime
About RYUSHOU
What kind of vessel is RYUSHOU?
RYUSHOU is a Cargo.
Where was RYUSHOU last seen?
RYUSHOU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is RYUSHOU's MMSI?
RYUSHOU's MMSI is 431006908. Call sign JD3916. IMO 9784219.
How big is RYUSHOU?
RYUSHOU is about 70 m long, 12 m on the beam, drawing 3.5 m.
Is RYUSHOU on the Master's Mate Safety Initiative Network?
Not yet. If RYUSHOU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.