[Callers] Ferry Boat Contra Ideas

[Lindsey Dono via Callers]

Hi Callers,
In a couple of weeks, I'll be calling the annual Ferry Boat Contra for the 
second time. Last year I put a good deal of effort into coming up with nautical 
themes/jokes, so this year I'll really need to go "overboard."
I'd love to hear your ideas regarding entertaining (but not distracting) 
maritime moves/terminology/jokes/trivia to add into my program. The majority of 
folks in my area have at least been on a boat other than a ferry, and a number 
sail regularly, but I'd rather keep the references from becoming too obscure. 
Looking forward to your suggestions!
Lindsey(Tacoma, WA)