On June 21, 2017 mooring trials of systems, equipment and practical items on the Multipurpose shallow-draft tug-salvage vessel "Kalas" with a capacity of 2.5-3 MW of the MPSV12 project, building number 1202 began at the Nevsky Shipyard.

The launching of the Multipurpose shallow-draft tug-salvage vessel project MPSV12 "Kalas", the construction of which is carried out for the FGM “Directorate of State Contracting Authority for Marine Transport Development Programmes ” was held in November last year.

The project was developed by Marine Engineering Bureau-Design-SPb CJSC.

The MPSV12 Multipurpose shallow-draft tug-salvage vessel (MPSV) is a shallow-draft vessel with an Arctic ice class Arc 5, an inclined stem, with a two-tier extended tank superstructure, an engine compartment in the middle part, with a diesel power plant, two adjustable pitch propellers, two bow thrusters and one stern thruster.