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.
Tug
CALYPSO
MMSI 230686000 · Call sign OJSY
Not yet on Master's MateType
Tug
Flag
FINLength
26 m
Beam
9 m
Draft
4.2 m
Call sign
OJSY
IMO
9304899
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
20
Registered in Finland, CALYPSO is a 26-metre working tug. She's built with a 9-metre beam and a 4.2-metre draft. She's on record as MMSI 230686000, call sign OJSY, IMO 9304899. The Master's Mate Safety Initiative Network welcomes CALYPSO — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for working boats
Built for boats that work — like CALYPSO.
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
Last known position · Jun 3, 2026
Position
60.4718° N, 26.9668° E
Working the Baltic Sea? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put CALYPSO 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 CALYPSO and switch it all on
Free to join · nothing to install to start · cancel anytime
About CALYPSO
What kind of vessel is CALYPSO?
CALYPSO is a Tug flagged to Finland.
Where was CALYPSO last seen?
CALYPSO was last reported in the Baltic Sea in Jun 2026 on public AIS.
What is CALYPSO's MMSI?
CALYPSO's MMSI is 230686000. Call sign OJSY. IMO 9304899.
How big is CALYPSO?
CALYPSO is about 26 m long, 9 m on the beam, drawing 4.2 m.
Is CALYPSO on the Master's Mate Safety Initiative Network?
Not yet. If CALYPSO is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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