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

JAVA SEA

MMSI 366904220 · Call sign WDB4958

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

33.6 m

Beam

10.4 m

Draft

3.7 m

Call sign

WDB4958

IMO

8023876

Official No.

636105

AIS reports

On the American registry, JAVA SEA is a 33.6-metre utility boat. She carries a 10.4-metre beam and a 3.7-metre draft. Officially she's MMSI 366904220, call sign WDB4958, IMO 8023876. JAVA SEA 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 JAVA SEA.

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 JAVA SEA 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 JAVA SEA 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 JAVA SEA and switch it all on

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

Claim free → unlock everything

About JAVA SEA

What kind of vessel is JAVA SEA?

JAVA SEA is a Towing Vessel flagged to United States of America.

What is JAVA SEA's MMSI?

JAVA SEA's MMSI is 366904220. Call sign WDB4958. IMO 8023876.

How big is JAVA SEA?

JAVA SEA is about 33.6 m long, 10.4 m on the beam, drawing 3.7 m.

Is JAVA SEA on the Master's Mate Safety Initiative Network?

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