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.

Commercial Fishing Vessel

Tantrum

MMSI 367172990 · Call sign WDD6443

Not yet on Master's Mate

Type

Commercial Fishing Vessel

Flag

USA

Length

23.8 m

Beam

6.7 m

Draft

3.7 m

Call sign

WDD6443

IMO

7932123

Official No.

603106

AIS reports

Tantrum, an American fishing trawler, measures 23.8 metres on deck. She has 6.7 metres in the beam and a draft measuring 3.7 metres. Look for MMSI 367172990, call sign WDD6443, IMO 7932123. Give Tantrum the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.

Free forever · No credit card · for working captains

Know where the fleet is. Get Tantrum home safe.

Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.

Keep the fleet in sight — free →

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

Wherever Tantrum 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 captains

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

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

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.

Systems Monitoring

Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.

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 Tantrum and switch it all on

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Claim free → unlock everything

About Tantrum

What kind of vessel is Tantrum?

Tantrum is a Commercial Fishing Vessel flagged to United States of America.

What is Tantrum's MMSI?

Tantrum's MMSI is 367172990. Call sign WDD6443. IMO 7932123.

How big is Tantrum?

Tantrum is about 23.8 m long, 6.7 m on the beam, drawing 3.7 m.

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

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