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.
Tug
OSG HORIZON
MMSI 338447000 · Call sign WDF6180
Not yet on Master's MateType
Tug
Flag
USALength
215 m
Beam
31 m
Draft
7.3 m
Call sign
WDF6180
IMO
9436549
Official No.
626863
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
19
An American tugboat, OSG HORIZON measures 215 metres. OSG HORIZON has a 31-metre beam and a 7.3 m draft. On AIS she shows as MMSI 338447000, call sign WDF6180, IMO 9436549. There's a place for OSG HORIZON on the Master's Mate Safety Initiative Network — free, community-driven, like AAA for the ocean.
Free forever · No credit card · for working boats
Built for boats that work — like OSG HORIZON.
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
Last known position · Jun 4, 2026
Position
29.7492° N, 95.1010° W
Working the Gulf of Mexico? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put OSG HORIZON 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 OSG HORIZON and switch it all on
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About OSG HORIZON
What kind of vessel is OSG HORIZON?
OSG HORIZON is a Tug flagged to United States of America.
Where was OSG HORIZON last seen?
OSG HORIZON was last reported in the Gulf of Mexico in Jun 2026 on public AIS.
What is OSG HORIZON's MMSI?
OSG HORIZON's MMSI is 338447000. Call sign WDF6180. IMO 9436549.
How big is OSG HORIZON?
OSG HORIZON is about 215 m long, 31 m on the beam, drawing 7.3 m.
Is OSG HORIZON on the Master's Mate Safety Initiative Network?
Not yet. If OSG HORIZON is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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