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.
Industrial Vessel
PT DEFIANCE
U.S. Official No. 661902
Not yet on Master's MateType
Industrial Vessel
Flag
USALength
54.9 m
Beam
15.2 m
Draft
4.3 m
First reported
Jun 2026
AIS reports
1
Registered in the United States, PT DEFIANCE is a 54.9-metre working ship. She carries a beam measuring 15.2 metres and a 4.3-metre draft. She's listed under U.S. official number 661902. The Master's Mate Safety Initiative Network welcomes PT DEFIANCE — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for commercial operators
Eyes on PT DEFIANCE, 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
Wherever PT DEFIANCE 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 commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put PT DEFIANCE 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 PT DEFIANCE and switch it all on
Free to join · nothing to install to start · cancel anytime
About PT DEFIANCE
What kind of vessel is PT DEFIANCE?
PT DEFIANCE is a Industrial Vessel flagged to United States of America.
What is PT DEFIANCE's U.S. Official No.?
PT DEFIANCE's U.S. Official No. is 661902.
How big is PT DEFIANCE?
PT DEFIANCE is about 54.9 m long, 15.2 m on the beam, drawing 4.3 m.
Is PT DEFIANCE on the Master's Mate Safety Initiative Network?
Not yet. If PT DEFIANCE 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.