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.
Commercial Fishing Vessel
PEN 4
U.S. Official No. 263481
Not yet on Master's MateType
Commercial Fishing Vessel
Flag
USALength
8.7 m
Beam
3.1 m
Draft
1.2 m
First reported
Jun 2026
AIS reports
1
PEN 4 is a commercial fishing vessel hailing from the United States, 8.7 metres from stem to stern. PEN 4 has a 3.1 m beam and a 1.2-metre draft. She's on record as U.S. official number 263481. PEN 4 can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
Free forever · No credit card · for working captains
Know where the fleet is. Get PEN 4 home safe.
Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.
Keep the fleet in sight — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever PEN 4 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 captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put PEN 4 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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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.
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 PEN 4 and switch it all on
Free to join · nothing to install to start · cancel anytime
About PEN 4
What kind of vessel is PEN 4?
PEN 4 is a Commercial Fishing Vessel flagged to United States of America.
What is PEN 4's U.S. Official No.?
PEN 4's U.S. Official No. is 263481.
How big is PEN 4?
PEN 4 is about 8.7 m long, 3.1 m on the beam, drawing 1.2 m.
Is PEN 4 on the Master's Mate Safety Initiative Network?
Not yet. If PEN 4 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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