So nuclear weapons require a few more steps than a normal bomb in order to arm properly. A normal bomb can be impact fuzed and just arm itself as soon as it drops off the plane. A nuclear bomb has to have specific things happen in a specific order and specific timing in order to go off right, and is built very specifically to make sure there are multiple steps needed to even begin that process (theoretically). The positions here are “I just want to get rid of the bomb” (REL), which you would use in case of a crash or a forced landing with damage, or a fire or something, and “yes I’m sure I want to nuke that target” (ARM/REL).
So nuclear weapons require a few more steps than a normal bomb in order to arm properly. A normal bomb can be impact fuzed and just arm itself as soon as it drops off the plane. A nuclear bomb has to have specific things happen in a specific order and specific timing in order to go off right, and is built very specifically to make sure there are multiple steps needed to even begin that process (theoretically). The positions here are “I just want to get rid of the bomb” (REL), which you would use in case of a crash or a forced landing with damage, or a fire or something, and “yes I’m sure I want to nuke that target” (ARM/REL).