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.
Towing Vessel
OTTO
MMSI 368210340 · Call sign WDM4850
Not yet on Master's MateType
Towing Vessel
Flag
USALength
83 m
Beam
12 m
Draft
2.8 m
Call sign
WDM4850
IMO
1307459
Official No.
1307459
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
86
An American workboat, OTTO measures 83 metres. She's built with a beam measuring 12 metres and a 2.8 m draft. On the registers she's MMSI 368210340, call sign WDM4850, IMO 1307459. OTTO is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for working boats
Built for boats that work — like OTTO.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 07:40 UTC
Position
30.0216° N, 93.9811° W
Status
Pushing ahead
Speed
0.0 kn
Course
137°
Destination
STS FLT
ETA
06-05 19:30 UTC
Working 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.
Free with your claim · for working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put OTTO on the map. It hands you the full bridge:
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
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.
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 OTTO and switch it all on
Free to join · nothing to install to start · cancel anytime
About OTTO
What kind of vessel is OTTO?
OTTO is a Towing Vessel flagged to United States of America.
Where was OTTO last seen?
OTTO was last reported in the Gulf of Mexico in Jun 2026 on public AIS.
What is OTTO's MMSI?
OTTO's MMSI is 368210340. Call sign WDM4850. IMO 1307459.
How big is OTTO?
OTTO is about 83 m long, 12 m on the beam, drawing 2.8 m.
Is OTTO on the Master's Mate Safety Initiative Network?
Not yet. If OTTO 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.