[Fishing joke]Same finshing spot joke

Paddy and Murphy had had a great day fishing, and on the way back in to the shore paddy said "gosh Murphy that was just fantastic.Do you think we can find the same spot tomorrow?"

"Sure" said Murphy.

"I put a cross on the side of the boat when we over the reef."

"Great" said Paddy...

"Oh, but Murhpy, how will we be sure of getting the same boat?"