Satellites

[Suicide Junkie]

Fighters can be placed in arbitrary sized stacks though.

When launching in combat, you can specify 5, 10, 15 etc.
When lauching outside of combat you can launch 5,10,15 etc, then move them away, launch more into a new stack, move them away.
When you're done you have arbitrarily many stacks of fighters, all in the same sector for defense.