You are correct. hermes left early as the ship was broke. Illustrious sailed on 4th August and relieved Invincible at the end of August. And so for about 18 hours both Invincible and Lusty were in the TEZ at the same time. For Invincible, the air war ended at 3.12pm on 27th August when the pipe was made... "Fall out from Flying stations". Invincible had continuously been at Flying stations since 4th April.