How Does a Flasher Work Ice Fishing?

Ice fishing has become increasingly popular in recent years, and with it the use of flashers. A flasher is a device that helps anglers identify fish activity and locate fish in the water below the ice.

It works by sending electrical pulses down into the water, which then bounce off objects such as fish or other debris. The returning echoes are displayed on a screen, allowing the angler to see what is happening below the ice.

A flasher consists of a transducer, which sends electrical pulses down into the water, and a receiver, which interprets and displays the returning echoes on a monitor. The transducer is usually mounted either on an ice rod or an ice sled (known as “trolling”) and is connected to an electrical power source. The receiver is located near or in the fishing hole itself.

The transducer sends out electrical pulses that travel through the water and bounce off any objects they encounter. When these pulses hit an object, they are reflected back up toward the surface as echoes. These echoes are then picked up by the receiver and displayed on a monitor for interpretation.

Flashers work best when used in conjunction with other methods of finding fish such as sonar or underwater cameras. They can help identify bottom structure that may be holding fish, as well as school sizes and movement patterns. They also provide valuable information about water temperature and depth.


Flashers are incredibly useful tools for ice fishers who want to increase their success rate while out on the ice. By sending out electrical pulses that reflect off of objects in the water below them, anglers can get real-time information about what’s happening beneath their feet which can significantly improve their odds at landing a catch.

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Lindsay Collins