... when u Jettison (destroy, yeah I found out the hard way) ...
Err... no,
"jettison" meansto drop (something) from a moving ship, airplane, etc.
Given the relative text-heaviness of this game, I suggest you actually look up or google words you don't understand instead of taking a "click-and-see-what-happens" attitude.
That said, an option (that can be turned on/off in settings) to warn users when they decide to jettison items might not be a bad idea.