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
AIMARU
MMSI 431007966 · Call sign JD3994
Not yet on Master's MateType
Tanker
Flag
JPNLength
65 m
Beam
10 m
Draft
3.6 m
Call sign
JD3994
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
35
AIMARU is a tank ship wearing Japanese colours, 65 metres long. Below, she has 10 metres in the beam and a draft of 3.6 m. Her papers read MMSI 431007966, call sign JD3994. AIMARU is welcome on the Master's Mate Safety Initiative Network — free situational awareness and a watch network shared by vessels of every size.
Free forever · No credit card · for commercial operators
Eyes on AIMARU, 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 4, 2026
Position
35.5191° N, 139.8241° 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 AIMARU 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 AIMARU and switch it all on
Free to join · nothing to install to start · cancel anytime
About AIMARU
What kind of vessel is AIMARU?
AIMARU is a Tanker flagged to Japan.
Where was AIMARU last seen?
AIMARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is AIMARU's MMSI?
AIMARU's MMSI is 431007966. Call sign JD3994.
How big is AIMARU?
AIMARU is about 65 m long, 10 m on the beam, drawing 3.6 m.
Is AIMARU on the Master's Mate Safety Initiative Network?
Not yet. If AIMARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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