Here's an approach to help you distinguish between liners and dropped takes.

When you're carp fishing, one of the challenges you come across is telling the difference between a big liner and an aborted take. You know the sort of thing: there you are, patiently waiting for a carp to pick up your bait, and all of a sudden you get a flurry of beep or maybe even the tip starts to nod and you think you're in! You're sure the lead has moved and rushing to the rod you enthusiastically strike into what to expect to be a great big carp but actually turns out to be fresh air. Using a carp rig with the grinner knot, this fishing tip will help you understand what happened.

For more information on the Beausoleil carp and catfish lake:
http://www.frenchcarpandcats.com/lakeoverview.php