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
HW OTTO
MMSI 636023011 · Call sign D5JP2
Not yet on Master's MateType
Tanker
Flag
LBRLength
180 m
Beam
32 m
Draft
6.8 m
Call sign
D5JP2
IMO
9394040
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
67
HW OTTO, a Liberian tanker, measures 180 metres on deck. She carries a beam of 32 m and a 6.8-metre draft. She broadcasts as MMSI 636023011, call sign D5JP2, IMO 9394040. Big or small, every hull benefits from the free Master's Mate Safety Initiative Network — HW OTTO included.
Free forever · No credit card · for commercial operators
Eyes on HW OTTO, 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
1.1691° N, 103.6103° E
Transiting the Strait of Malacca? 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 HW OTTO 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 HW OTTO and switch it all on
Free to join · nothing to install to start · cancel anytime
About HW OTTO
What kind of vessel is HW OTTO?
HW OTTO is a Tanker flagged to Liberia.
Where was HW OTTO last seen?
HW OTTO was last reported in the Strait of Malacca in Jun 2026 on public AIS.
What is HW OTTO's MMSI?
HW OTTO's MMSI is 636023011. Call sign D5JP2. IMO 9394040.
How big is HW OTTO?
HW OTTO is about 180 m long, 32 m on the beam, drawing 6.8 m.
Is HW OTTO on the Master's Mate Safety Initiative Network?
Not yet. If HW OTTO is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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