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

JUSTIN CALLAIS

MMSI 366990380 · Call sign WCZ5803

Not yet on Master's Mate

Type

Offshore Supply Vessel

Flag

USA

Length

46.5 m

Beam

13.4 m

Draft

3.7 m

Call sign

WCZ5803

IMO

8964850

Official No.

1085966

AIS reports

JUSTIN CALLAIS flies the American flag — a 46.5-metre utility vessel. She carries a 13.4 m beam and a 3.7-metre draft. Look for MMSI 366990380, call sign WCZ5803, IMO 8964850. Working vessels like JUSTIN CALLAIS are never truly alone on the Master's Mate Safety Initiative Network — free, with a fleet on watch.

Free forever · No credit card · for working boats

Built for boats that work — like JUSTIN CALLAIS.

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 JUSTIN CALLAIS 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 JUSTIN CALLAIS 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 JUSTIN CALLAIS and switch it all on

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Claim free → unlock everything

About JUSTIN CALLAIS

What kind of vessel is JUSTIN CALLAIS?

JUSTIN CALLAIS is a Offshore Supply Vessel flagged to United States of America.

What is JUSTIN CALLAIS's MMSI?

JUSTIN CALLAIS's MMSI is 366990380. Call sign WCZ5803. IMO 8964850.

How big is JUSTIN CALLAIS?

JUSTIN CALLAIS is about 46.5 m long, 13.4 m on the beam, drawing 3.7 m.

Is JUSTIN CALLAIS on the Master's Mate Safety Initiative Network?

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