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.

Recreational

CALLISTO

MMSI 366968830 · Call sign WRB9979

Not yet on Master's Mate

Type

Recreational

Flag

USA

Length

11.9 m

Beam

3.3 m

Draft

1.5 m

Call sign

WRB9979

Official No.

653007

AIS reports

CALLISTO is a recreational vessel flying the flag of the United States, 11.9 metres long. Her hull carries a 3.3-metre beam and a draft of 1.5 m. Find her under MMSI 366968830, call sign WRB9979. Bring CALLISTO aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.

Free forever · No credit card · for recreational captains

Keep CALLISTO looked after — even when you’re not aboard.

Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.

Look after her — claim free →

Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever CALLISTO 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 recreational captains

The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put CALLISTO on the map. It hands you the full bridge:

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.

Weather & Routing

GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.

Worldwide Charts

Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.

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.

Distress Mesh

Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.

Hail Any Captain

A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.

Claim CALLISTO and switch it all on

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

Claim free → unlock everything

About CALLISTO

What kind of vessel is CALLISTO?

CALLISTO is a Recreational flagged to United States of America.

What is CALLISTO's MMSI?

CALLISTO's MMSI is 366968830. Call sign WRB9979.

How big is CALLISTO?

CALLISTO is about 11.9 m long, 3.3 m on the beam, drawing 1.5 m.

Is CALLISTO on the Master's Mate Safety Initiative Network?

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