A question about hps-midway

[Ratel]

It's good tactic to change direction after your aircraft has taken off. Especially if you have been sighted by the enemy already. By changing direction you can attempt to avoid his incoming strike by 'disappearing' again, but then you must shoot down his recon airplane.
Second reason, if you have not been spotted by the enemy yet, is that keeping you ship going in the direction for your planes to take off, can result in your carrier sailing too far away from the enemy, thereby making it longer for your own strike to reach him and thereby running out of time before the battle ends.