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

MARTHA S

U.S. Official No. 251669

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

26.7 m

Beam

6.1 m

Draft

1.9 m

First reported

Jun 2026

AIS reports

MARTHA S is a working vessel listed on the the United States registry, 26.7 metres on deck. Her hull carries a beam measuring 6.1 metres and a draft measuring 1.9 metres. On the registers she's U.S. official number 251669. Put MARTHA S on the free Master's Mate Safety Initiative Network and keep the working fleet looking out for each other.

Free forever · No credit card · for working boats

Built for boats that work — like MARTHA S.

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 MARTHA S 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 MARTHA S 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 MARTHA S and switch it all on

Free to join · nothing to install to start · cancel anytime

Claim free → unlock everything

About MARTHA S

What kind of vessel is MARTHA S?

MARTHA S is a Towing Vessel flagged to United States of America.

What is MARTHA S's U.S. Official No.?

MARTHA S's U.S. Official No. is 251669.

How big is MARTHA S?

MARTHA S is about 26.7 m long, 6.1 m on the beam, drawing 1.9 m.

Is MARTHA S on the Master's Mate Safety Initiative Network?

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