Tomahawks...?
The tomahawk strike on the runway signals the enemy awareness to the situation, and also alerts any bandits to redirect to defend the target....
The reason the team sets their timers is so they can get to the target before the enemy aircraft can reach them....
...So couldn't they have timed the tomahawk strike tighter? The approximate time from launch to target would be easy to calculate, no? Could they have even waited until they strike the target to land the tomahawks?