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

John Roberts

MMSI 366993460 · Call sign WDC2458

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

32.6 m

Beam

10.4 m

Draft

2.7 m

Call sign

WDC2458

IMO

8850982

Official No.

581854

AIS reports

John Roberts is an utility boat listed on the the United States registry, 32.6 metres from stem to stern. She's built with a beam of 10.4 m and a 2.7-metre draft. On AIS she appears as MMSI 366993460, call sign WDC2458, IMO 8850982. John Roberts 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 working boats

Built for boats that work — like John Roberts.

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 John Roberts 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 John Roberts 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 John Roberts and switch it all on

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About John Roberts

What kind of vessel is John Roberts?

John Roberts is a Towing Vessel flagged to United States of America.

What is John Roberts's MMSI?

John Roberts's MMSI is 366993460. Call sign WDC2458. IMO 8850982.

How big is John Roberts?

John Roberts is about 32.6 m long, 10.4 m on the beam, drawing 2.7 m.

Is John Roberts on the Master's Mate Safety Initiative Network?

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