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.

Tank Ship

Sunny Williams

MMSI 367359930 · Call sign WDE4940

Not yet on Master's Mate

Type

Tank Ship

Flag

USA

Length

25.8 m

Beam

8.2 m

Draft

3 m

Call sign

WDE4940

Official No.

1211434

AIS reports

On the American registry, Sunny Williams is a 25.8-metre tank vessel. She has a beam of 8.2 m and a draft measuring 3 metres. Officially she's MMSI 367359930, call sign WDE4940. Sunny Williams 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 commercial operators

Eyes on Sunny Williams, 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 Sunny Williams 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 Sunny Williams 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 Sunny Williams and switch it all on

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

Claim free → unlock everything

About Sunny Williams

What kind of vessel is Sunny Williams?

Sunny Williams is a Tank Ship flagged to United States of America.

What is Sunny Williams's MMSI?

Sunny Williams's MMSI is 367359930. Call sign WDE4940.

How big is Sunny Williams?

Sunny Williams is about 25.8 m long, 8.2 m on the beam, drawing 3 m.

Is Sunny Williams on the Master's Mate Safety Initiative Network?

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