Boudreaux & Thibodeaux go fishing

Boudreaux & Thibodeaux decided that they wanted to go fishing one day but Boudreaux's boat and motor was broke. So they decided to go down on da bayou where they knew there was a man who rented boats. Once there, the man proceeded to rent dem a boat and they was off to catch da fish.
Dey pick a spot near da middle of da bayou to catch da fish and catch fish they did. "Man Thibodeaux I dont think I never caught so many fish before" said Boudreaux, "Me neither" Thibodeaux replied.
"We need to mark where dis fishin hole is and come back again another time and catch da rest", said Thibodeaux as he looked around for a tree branch to tie a marker to.
"Man Thib" said Boubreaux we in da middle of the bayou theres no wheres you can tie dat marker, as he dug into his tackle box. pulled out a knife and proclaim "Look I gots an idea!" Boudreaux then proudly began to carve a big "X" in bottom of the boat.
Man! Thibodeaux exclaimed "Boudreaux you fool, dat ain't going to work no".
"I mean how you know next time we gonna get da same boat!"