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.

Unclassified

YMS 439

U.S. Official No. 253244

Not yet on Master's Mate

Type

Unclassified

Flag

USA

Length

38.6 m

Beam

7.5 m

Draft

3.5 m

First reported

Jun 2026

AIS reports

YMS 439, a vessel wearing American colours, measures 38.6 metres on deck. She has a beam of 7.5 m and a draft of 3.5 m. Her papers read U.S. official number 253244. YMS 439 can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.

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Is YMS 439 your boat?

Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.

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Wherever YMS 439 roams, you're never out there alone.

Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.

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The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put YMS 439 on the map. It hands you the full bridge:

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.

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.

Onboard Cameras

Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.

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.

Hail Any Captain

A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.

Claim YMS 439 and switch it all on

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About YMS 439

What kind of vessel is YMS 439?

YMS 439 is a Unclassified flagged to United States of America.

What is YMS 439's U.S. Official No.?

YMS 439's U.S. Official No. is 253244.

How big is YMS 439?

YMS 439 is about 38.6 m long, 7.5 m on the beam, drawing 3.5 m.

Is YMS 439 on the Master's Mate Safety Initiative Network?

Not yet. If YMS 439 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).