MMSI 203999426 · Call sign OED3050
Not yet on Master's MateWIEN flies the Austrian flag — a 36-metre passenger boat. WIEN has 9 metres in the beam and a 1 m draft. She broadcasts as MMSI 203999426, call sign OED3050. WIEN is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Joining the Safety Initiative Network doesn't just put WIEN on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.