[bombcar]

The black box doesn’t transmit its location. If they find it, it would/will tell you some of what happened, but if you sink it in the Mariana Trench and they can’t find it, you’ve “won”.

[kube-system]

The black box can also transmit its location, albeit only after the plane hits the ocean: https://en.wikipedia.org/wiki/Underwater_locator_beacon