smaller bb/ebb's 2,3's cover middle. middle is very important.
AA gunners cover bb's but dont cross over them. bb's are looking down field most time, not at their ship. a scout or fighter isn't so important that we would like to give up
cv's pull fighters away, try not to have dog fights over bb's unless they are enemy bb's.
Oh and warn when you cross, but try not to cross. (my macro usually don't work about this time)