tip up fishing apparatus

A type of fishing apparatus that is placed over a whole cut or drilled through the ice. They are usually made of wood or plastic and have an attached flag on a spring type pole. When a tip up is set, the flag is down; when a fish bites, it pulls the latch, allowing the flag to pop up. This way, an angler can have several set on different holes at the same time, and still keep track of what poles have most likely caught a fish.