BRDM is an initialism for Boyevaya Razvedyvatelnaya Dozornaya Mashina, (RU Боевая Разведывательная Дозорная Машина), literally "Combat Reconnaissance Patrol Vehicle". The BRDM is a four wheeled amphibious vehicle which is very lightly armoured by today's standards. Both versions were produced in the Soviet Union and other Eastern Bloc countries. Both versions came in an ATGM variant. The BRDM-2 also came as a command vehicle and as an air defence vehicle. It comes in three versions: