Sooooooo......your ruling out any ladies older then 29 (your age)??? I think there might be slim pickin's. I think realistically you should keep your eye our for some COUGARS (which is single women 10+ years more then you in age) based on the typical cruise. Given the time of sailing (winter, but before winter break for most schools) the number of 23-29 ladies that are unavailable will be limited. Not to worry some 40-50 year olds can be quite "fun" if your open to age differences.
I'll be on your sailing if you want a wingman (assuming I can get free of the wife) to lend a hand.