Towing of twin-pontoons by BTO, OT-2000, OTA type tugs

Towing of twin-pontoons by BTO, OT-2000, OTA type tugs from St. Petersburg to Bautino (Kazakhstan) through RIWS to the Caspian Sea.
We have towed several sets of specialized twin-barges, designed for maritime&river operations. Each set is made up of several parts which can be joined between themselves to massive pontoon.