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.

Industrial Vessel

GIS Grizzly

MMSI 367621980 · Call sign WDH4846

Not yet on Master's Mate

Type

Industrial Vessel

Flag

USA

Length

45.5 m

Beam

11 m

Draft

3.7 m

Call sign

WDH4846

IMO

9566887

Official No.

1221524

AIS reports

GIS Grizzly flies the American flag — a 45.5-metre merchant vessel. Below, she has 11 metres in the beam and a draft measuring 3.7 metres. Officially she's MMSI 367621980, call sign WDH4846, IMO 9566887. Sign GIS Grizzly up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.

Free forever · No credit card · for commercial operators

Eyes on GIS Grizzly, around the clock.

Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.

Put her on the dashboard — free →

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

Wherever GIS Grizzly 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 commercial operators

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

Joining the Safety Initiative Network doesn't just put GIS Grizzly 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.

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.

Worldwide Charts

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

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.

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 GIS Grizzly and switch it all on

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

Claim free → unlock everything

About GIS Grizzly

What kind of vessel is GIS Grizzly?

GIS Grizzly is a Industrial Vessel flagged to United States of America.

What is GIS Grizzly's MMSI?

GIS Grizzly's MMSI is 367621980. Call sign WDH4846. IMO 9566887.

How big is GIS Grizzly?

GIS Grizzly is about 45.5 m long, 11 m on the beam, drawing 3.7 m.

Is GIS Grizzly on the Master's Mate Safety Initiative Network?

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