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.

Anti-pollution

KOSTERHAVET

MMSI 265706890 · Call sign SFC9805

Not yet on Master's Mate

Type

Anti-pollution

Flag

SWE

Length

11 m

Beam

4 m

Draft

0.9 m

Call sign

SFC9805

First reported

Jun 2026

Last reported

Jun 2026

AIS reports

KOSTERHAVET is a Swedish craft, 11 metres from stem to stern. She's built with a beam measuring 4 metres and a 0.9-metre draft. Her registration reads MMSI 265706890, call sign SFC9805. It's free to add KOSTERHAVET to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.

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Last known position · Jun 3, 2026

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Position

58.8944° N, 11.0126° E

Crossing the Baltic Sea? You're never out there alone.

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Joining the Safety Initiative Network doesn't just put KOSTERHAVET 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.

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About KOSTERHAVET

What kind of vessel is KOSTERHAVET?

KOSTERHAVET is a Anti-pollution flagged to Sweden.

Where was KOSTERHAVET last seen?

KOSTERHAVET was last reported in the Baltic Sea in Jun 2026 on public AIS.

What is KOSTERHAVET's MMSI?

KOSTERHAVET's MMSI is 265706890. Call sign SFC9805.

How big is KOSTERHAVET?

KOSTERHAVET is about 11 m long, 4 m on the beam, drawing 0.9 m.

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

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