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.
Vessel
OTTO H
MMSI 538006810 · Call sign V7RJ4
Not yet on Master's MateFlag
MHLLength
169 m
Beam
26 m
Draft
8.9 m
Call sign
V7RJ4
IMO
9749374
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
33
Registered in the Marshall Islands, OTTO H is a 169-metre boat. Her hull carries a 26-metre beam and a draft of 8.9 m. On AIS she shows as MMSI 538006810, call sign V7RJ4, IMO 9749374. Bring OTTO H aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
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Is OTTO H your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 3, 2026
Position
29.7506° N, 95.0952° W
Crossing the Gulf of Mexico? 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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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put OTTO H on the map. It hands you the full bridge:
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
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.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim OTTO H and switch it all on
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About OTTO H
What kind of vessel is OTTO H?
OTTO H is a vessel flagged to Marshall Islands.
Where was OTTO H last seen?
OTTO H was last reported in the Gulf of Mexico in Jun 2026 on public AIS.
What is OTTO H's MMSI?
OTTO H's MMSI is 538006810. Call sign V7RJ4. IMO 9749374.
How big is OTTO H?
OTTO H is about 169 m long, 26 m on the beam, drawing 8.9 m.
Is OTTO H on the Master's Mate Safety Initiative Network?
Not yet. If OTTO H is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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