I have a note saying:"The frequency for the default Acceleration carrier is 111MHz or TCN 47X. The frequency for Javier's Nimitz carrier is 112MHz or TCN 57X". Are these add-ons?
Yes, you'll need the NEW Realistic HUD for the FSX Acceleration F/A-18 Hornet
by Jivko Rusev (neutrino here on these forums). Read more about it here: http://www.fsdreamteam.com/forum/index.php?topic=2342.0
Last question: Is there an equivalent AF Manual available for the Navy, to learn about carrier flight procedures, phraseology etc.?
Probably NATOPS, but you'll definitely want to check out the Unofficial F/A-18 Acceleration Pack
board. The people who frequent there are really into FSX naval aviation, and some good discussions happen there. Feel free to pop by and ask questions there, as well.
There are a few other addons that are essential to FSX naval aviation, such as Javier's Nimitz
and the Sludge Hornet
. Sorry, I'm a bit short on time at the moment, so I've just thrown a few links out there.
Glad I could help!