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.

Passenger (Inspected)

SOUND ARROW

MMSI 367376310 · Call sign WCY7644

Not yet on Master's Mate

Type

Passenger (Inspected)

Flag

USA

Length

10.8 m

Beam

3.6 m

Draft

1.7 m

Call sign

WCY7644

Official No.

540195

AIS reports

An American passenger ferry, SOUND ARROW measures 10.8 metres. Her hull carries a 3.6 m beam and a draft of 1.7 m. Her registration reads MMSI 367376310, call sign WCY7644. SOUND ARROW is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.

Free forever · No credit card · for passenger & charter operators

Keep every soul aboard SOUND ARROW safe.

Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.

Switch on the safety stack — free →

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

Wherever SOUND ARROW 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 passenger & charter operators

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

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

Distress Mesh

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

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.

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.

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 SOUND ARROW and switch it all on

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

Claim free → unlock everything

About SOUND ARROW

What kind of vessel is SOUND ARROW?

SOUND ARROW is a Passenger (Inspected) flagged to United States of America.

What is SOUND ARROW's MMSI?

SOUND ARROW's MMSI is 367376310. Call sign WCY7644.

How big is SOUND ARROW?

SOUND ARROW is about 10.8 m long, 3.6 m on the beam, drawing 1.7 m.

Is SOUND ARROW on the Master's Mate Safety Initiative Network?

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