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
UNDERTOW II
U.S. Official No. 989938
Not yet on Master's MateType
Towing Vessel
Flag
USALength
9.8 m
Beam
3 m
Draft
10.1 m
First reported
Jun 2026
AIS reports
1
Out of the United States, UNDERTOW II is a 9.8-metre utility vessel. UNDERTOW II has a beam measuring 3 metres. She's listed under U.S. official number 989938. There's a place for UNDERTOW II 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 UNDERTOW II.
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
Wherever UNDERTOW II roams, 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 UNDERTOW II 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 UNDERTOW II and switch it all on
Free to join · nothing to install to start · cancel anytime
About UNDERTOW II
What kind of vessel is UNDERTOW II?
UNDERTOW II is a Towing Vessel flagged to United States of America.
What is UNDERTOW II's U.S. Official No.?
UNDERTOW II's U.S. Official No. is 989938.
How big is UNDERTOW II?
UNDERTOW II is about 9.8 m long, 3 m on the beam, drawing 10.1 m.
Is UNDERTOW II on the Master's Mate Safety Initiative Network?
Not yet. If UNDERTOW II is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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