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

Big Daddy

MMSI 367030520 · Call sign WDC4779

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

17 m

Beam

8 m

Draft

2.9 m

Call sign

WDC4779

Official No.

631486

AIS reports

Out of the United States, Big Daddy is a 17-metre harbour workboat. Her hull carries a beam measuring 8 metres and a draft of 2.9 m. She's listed under MMSI 367030520, call sign WDC4779. Big Daddy is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

Free forever · No credit card · for working boats

Built for boats that work — like Big Daddy.

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 Big Daddy 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 Big Daddy 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 Big Daddy and switch it all on

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

Claim free → unlock everything

About Big Daddy

What kind of vessel is Big Daddy?

Big Daddy is a Towing Vessel flagged to United States of America.

What is Big Daddy's MMSI?

Big Daddy's MMSI is 367030520. Call sign WDC4779.

How big is Big Daddy?

Big Daddy is about 17 m long, 8 m on the beam, drawing 2.9 m.

Is Big Daddy on the Master's Mate Safety Initiative Network?

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