MARCO ISLAND, Fla. - Some fishermen would say next to their fishing pole, a GPS is one of the most important tools they use on the water. Thieves on Marco Island stole the GPS off Kris Kugler's boat. They sliced right through this boat cover.

"He had docked it one evening, but did not take his GPS off and then the weather got kind of bad, we're guessing a week, week and a half later. he came out to take the boat out and that's the first thing you do is take the covers off and it's missing," said Kris Kulger.

That made it difficult for her husband to find his favorite fishing sites.

"All his great spots that he's worked seven years to accumulate on there," said Kugler.

Half a dozen other boats are missing their GPS' and other equipment. Marco Island Police are investigating. And Kugler warns other residents to be on alert.

"You kind of live in this area where you have a false sense of security and you leave things out so we're going to take a little more precaution, he's going to start, he's gong to take in the GPS and anything else he might leave on the boat, and i would just caution everyone else do the same," said Kugler.