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 Barge

Double Skin 307

MMSI 367640070 · Call sign WDH6636

Not yet on Master's Mate

Type

Tank Barge

Flag

USA

Length

87.5 m

Beam

18.9 m

Draft

5.6 m

Call sign

WDH6636

Official No.

1252168

AIS reports

Double Skin 307 is an American tank ship — 87.5 metres overall. She has 18.9 metres in the beam and a draft of 5.6 m. Her registration reads MMSI 367640070, call sign WDH6636. Sign Double Skin 307 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 commercial operators

Eyes on Double Skin 307, 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 Double Skin 307 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 Double Skin 307 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 Double Skin 307 and switch it all on

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

Claim free → unlock everything

About Double Skin 307

What kind of vessel is Double Skin 307?

Double Skin 307 is a Tank Barge flagged to United States of America.

What is Double Skin 307's MMSI?

Double Skin 307's MMSI is 367640070. Call sign WDH6636.

How big is Double Skin 307?

Double Skin 307 is about 87.5 m long, 18.9 m on the beam, drawing 5.6 m.

Is Double Skin 307 on the Master's Mate Safety Initiative Network?

Not yet. If Double Skin 307 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).