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.

Offshore Supply Vessel

BERTHA D

U.S. Official No. 266946

Not yet on Master's Mate

Type

Offshore Supply Vessel

Flag

USA

Length

9.8 m

Beam

3.6 m

Draft

1.5 m

First reported

Jun 2026

AIS reports

BERTHA D is an American working craft — 9.8 metres overall. Her hull carries a 3.6 m beam and a draft of 1.5 m. Officially she's U.S. official number 266946. Sign BERTHA D up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.

Free forever · No credit card · for working boats

Built for boats that work — like BERTHA D.

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 BERTHA D 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 BERTHA D 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 BERTHA D and switch it all on

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

Claim free → unlock everything

About BERTHA D

What kind of vessel is BERTHA D?

BERTHA D is a Offshore Supply Vessel flagged to United States of America.

What is BERTHA D's U.S. Official No.?

BERTHA D's U.S. Official No. is 266946.

How big is BERTHA D?

BERTHA D is about 9.8 m long, 3.6 m on the beam, drawing 1.5 m.

Is BERTHA D on the Master's Mate Safety Initiative Network?

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