This manual provides instructions for installing and operating the 3500 digital sonar. It is a high-performance digital sonar that operates only off the bottom signal and has completely automatic operation. There are no sensitivity or noise controls.
The Lowrance 3500 is a high-performance digital sonar that operates automatically using only the bottom signal. It features an internal computer that eliminates the need for manual sensitivity or noise controls. The unit fits into a standard 2 1/8-inch hole and requires specific clearance space behind the dashboard for proper installation.
The maximum usable dash thickness is 1 1/8" (28.5 mm).
The unit must be wired to a 3-amp fuse.
The unit will track the bottom at speeds over 70 m.p.h..