This is the way sonar should work: You see the fish, you catch the fish. Yet it’s not always so easy. Fast-moving game species, such as tuna and kingfish, as well as forage species, like squid, can be notoriously tough to detect on sonar, especially when the boat’s underway. What’s the secret to seeing these on sonar? Whether you have a CHIRP or conventional fish finder, the answer often lies in the transducer you choose, where you place it and how it is installed.
No matter what type or brand of sonar you have aboard your boat, if you are serious about finding fish, there are truths about down-looking transducers you must consider.