sentences:  The deck was protected by armor plates, while those of the conning tower were thick.Initially built without a sonar, "Kalinin" received the Lend-Lease ASDIC-132 system, which the Soviets called Drakon-132, as well as the experimental Soviet Mars-72 system by 1945.As built she lacked any radars, but by 1944 she was equipped with British and American Lend-Lease radars as well as Soviet-designed systems.