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.
Tanker
HOUSEIMARU NO21
Tanker · last seen 35°N 135°E · Jun 2026 · MMSI 431011753 · Call sign JD4422
Not yet on Master's MateType
Tanker
Length
65 m
Beam
10 m
Draft
3.6 m
Call sign
JD4422
IMO
9864710
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
6
HOUSEIMARU NO21 is a 65-metre tanker. Below, she has 10 metres in the beam and a draft measuring 3.6 metres. Look for MMSI 431011753, call sign JD4422, IMO 9864710. Give HOUSEIMARU NO21 the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
Free forever · No credit card · for commercial operators
Eyes on HOUSEIMARU NO21, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
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Last known position · Jun 15, 2026
Position
34.6145° N, 135.4265° 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 HOUSEIMARU NO21 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 HOUSEIMARU NO21 and switch it all on
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About HOUSEIMARU NO21
What kind of vessel is HOUSEIMARU NO21?
HOUSEIMARU NO21 is a Tanker.
Where was HOUSEIMARU NO21 last seen?
HOUSEIMARU NO21 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is HOUSEIMARU NO21's MMSI?
HOUSEIMARU NO21's MMSI is 431011753. Call sign JD4422. IMO 9864710.
How big is HOUSEIMARU NO21?
HOUSEIMARU NO21 is about 65 m long, 10 m on the beam, drawing 3.6 m.
Is HOUSEIMARU NO21 on the Master's Mate Safety Initiative Network?
Not yet. If HOUSEIMARU NO21 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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