Already tried the raise fleets button - said I'd already raised my fleets when i had not. I'll try it again.Unless you're playing a mod you should definitely have ships, yes. Do note that they're called up with a different button than regular levies.
Oh, and why use the Wikia when you can use the MediaWiki Crusader Kings II Wiki?
And the wikia still has a few articles that are more informative than the wiki.