AC for ships and... The Beholder!

Greetings, Autarchs!:

I’ve recently ended my reading of ACKS core and I really enjoyed it. But, as nothing is perfect, I’ve two questions about things that aren’t clear for me:

  1. I can’t determine the AC of the target ship when somebody is attacking with a balista or a catapult and I don’t consider realistic assume that every ship has a 0AC.

  2. I can’t find any kind of Beholder in the bestiary. Why? Was there rights issues? Didn’t you liked this monster?

Thank you in advance and apologize for my english.

to 2): beholder is copyright by wotc as far as i know. there is the sphere of many eyes in the downloads section which is closely based on the beholder

I’ve spotted that, it’s in the Monster Optional Rules, isn’t it?

Thank you!

As far as I can tell, Armor Class for ships is listed on page 95, on the chart labeled “Sea Vessels”.