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.

Vessel

Johanna Oldendorff

MMSI 636091089

Not yet on Master's Mate

Flag

LBR

Length

225 m

IMO

9057446

AIS reports

On the Liberian registry, Johanna Oldendorff is a 225-metre vessel. Find her under MMSI 636091089, IMO 9057446. Claim Johanna Oldendorff free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.

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Is Johanna Oldendorff your boat?

Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.

Claim this boat — free →

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

Wherever Johanna Oldendorff 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

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

Joining the Safety Initiative Network doesn't just put Johanna Oldendorff 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.

Worldwide Charts

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

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.

Onboard Cameras

Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.

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.

Hail Any Captain

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

Claim Johanna Oldendorff and switch it all on

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About Johanna Oldendorff

What kind of vessel is Johanna Oldendorff?

Johanna Oldendorff is a vessel flagged to Liberia.

What is Johanna Oldendorff's MMSI?

Johanna Oldendorff's MMSI is 636091089. IMO 9057446.

How big is Johanna Oldendorff?

Johanna Oldendorff is about 225 m long.

Is Johanna Oldendorff on the Master's Mate Safety Initiative Network?

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