Shipbuilding company: Pervomaisky Shipyard (Kazakhstan, Pribrezhny)
Length, m: 51.5
Width, m: 17,3
Lateral height, m: 2.3
Draft with full reserves, m: 0,95
Deadweight, t: 28
Gross tonnage (GT) ): 283
Total power of the main diesel engines: 2x221
Of the BTK 1721 design only 3 wheeled tugs were built.
BTK 601, built in 1973, believed to have been scrapped in the 1980s.
BTK 602, Built 1974, Scrapped in the 1980's at Semey, Kazakhstan.
BTK 603, Built 1974, Whereabouts unknown.