Nose & tail bomb fuzes

[hrc]

  I don't understand the difference between them. I understand that US bombs have both types of fuzes in them and they can even be selected by pilot in flight.

[s171s]

explosion on contact with the surface - nose fuze

 

bomb penetrated into the ground and then explodes - tail fuze

 

Sorry for my bad english...

[+76.IAP-Blackbird]

tail fuze can be set with delay

[s171s]

it all depends on the type of target

[hrc]

Specifically, in F-16 pilot can choose nose, tail and nose-tail fuze settings for Mk series of bombs.  What would nose-tail setting then be? Both fuses armed I guess?