fishfinder . This is a sonar system that provides depth information, as well as indicating the presence of fish or other objects. These flashers, unlike most typical fishfinders, display the movement of fish and other objects almost instantaneously. The bait being used can often be seen as a mark on the flasher, enabling the angler to position the bait right in front of the fish. Underwater cameras are also now available which allow the user to view the fish and observe their reaction to the lure presentation. Clubbing is an old method seldom used today, mainly used on burbot, the fisher walks on clear ice in shallow water and sees a large fish through the ice and with a large club which they slam into the ice, the shockwave hits the fish and it is temporary paralyzed, which gives the fisher time to cut a hole in the ice to collect the fish. Ice fishing on ice Ice fishing methods have changed drastically over the past 20 years. The name of the game is mobility for today's modern ice anglers. The days of drilling hole, waiting and hoping that a fish will swim by, are starting to fade. With light gear, battery-operated sonar units, and fast and powered augers, an angler can conceivably drill and check hundreds of holes in a single day. When the fish stop biting where they are, anglers can move to the next hole, checking it with their sonar first to look for activity, and if there are no fish they will keep moving until fish are found. In addition, schools of fish tend to move around; so a hole may be productive for 10 minutes and then slow down to nothing for an hour before a school returns to that location. This "fish where the fish are" technique and ease of mobility increases the catch rate of any angler, because it minimizes the wait between bites, similar to "trolling" in the summer months. Anglers can now use many available maps and surveys to help pinpoint lakes and areas within those lakes that make sense to try for specific fish, noting those locations in latitude and longitude coordinates. They are then able to use a handheld GPS receiver to aim them to those spots, usually with accuracy of less than 20 feet. Ice anglers then drill holes with whichever auger they have, checking the ice thickness