What prayer is said when affixing a Mezooza to your doorpost?

Hi there, wanted to know if I am allowed to be on a cruise on Shabbat? That's if I have boarded the ship before Shabbat and left the ship after Shabbat? Now the real question is, would this be applicable for an airplane?

What is tish ?

What are the prayers read on Yom Kippur?

Is it permitted to build a succah during chol hamoed succoth? (e.g. you arrive at a place during chol hamoed where you have to stay and there is no succah; or, your succah blows away during the holiday, can you put up a new one?)