MMSI 273449240 · Call sign UBOO
Not yet on Master's MateOn the Russian registry, DOBRYNYA is a 29-metre tugboat. DOBRYNYA has a beam measuring 8 metres and a 3.4 m draft. On AIS she shows as MMSI 273449240, call sign UBOO, IMO 8730077. Join DOBRYNYA to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
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
Joining the Safety Initiative Network doesn't just put DOBRYNYA on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.