[Berlin_Freeper]

‘more survivable’ means people around the target can survive.

[donozark]

For how long? /

[shotgun]

As opposed to the neutron bomb which would kill the people but leave the buildings intact. Plus it only had a 7 year half-life.

Thanks Jimmah Cahtah

[DoughtyOne]

Those are still large enough yields to cause terrible destruction, but that may be an aspect of the survivability.

Another would be the supersonic speeds they may travel at, and thus have a better chance of surviving to the target.

[AndyJackson]

more survivable means that it is launched from a submarine, unlike a bomb dropped from say an F-16 which has a likelihood of being shot down.