 In addition, ultra-large-yield thermonuclear bombs were considered by the Long Range Aviation units of the USSR, as their use fits the "cause the greatest damage to the enemy with a minimal number of carriers (i.e.bombers)" doctrine, while it was also necessary to consider the practical feasibility of such heavy thermonuclear weapons with reliably predictable characteristics.Before this, an underwater "doomsday weapon" considered by Soviet military and technical experts – essentially a giant torpedo launched by a dedicated nuclear submarine – was planned for development which would detonate its nuclear warhead near the US coast causing a huge tsunami.