Selecting A Transducer - Garmin Fishfinder 320C Owner's Manual And Reference Manual

Transducers
The transducer acts as the eyes and ears of your new sonar. Proper transducer selection and installation
are important to the operation of your unit. The transducer transmits sound waves toward the bottom in a
cone shape. The larger the cone angle the larger the coverage area at a given depth. While it is good to see as
large of an area as possible, it is best to select a transducer that suits the water that you are on.
A wide cone angle transducer works best in shallower water. The wide cone angle provides a large cov-
erage or viewing area, but at a decreased bottom resolution. In deeper water this can result in a large dead
zone where fish cannot be seen.
A narrow cone angle transducer is better suited to deep water installations. The narrow cone angle pro-
vides a smaller coverage or viewing area (compared to a wide cone angle transducer at the same depth) with
improved bottom resolution and a smaller dead zone.
A variety of optional transducers are available from your local dealer or direct from Garmin.
• 200/50kHz, 12/45°, plastic, transom mount, depth, temp
• 200/50kHz, 12/45°, plastic, transom mount, depth, temp, speed
• 200/50kHz, 12/45°, bronze, thru-hull mount, depth
• 200/50kHz, 12/45°, bronze, thru-hull mount, depth, temp, speed
• 200/50kHz, 12/45°, bronze, thru-hull mount/long stem, depth, temp, speed
• 200/50kHz, 12/45°, plastic, thru-hull mount, depth
• 200/50kHz, 12/45°, plastic, adjustable. in-hull mount
• 200kHz, 14°, plastic, transom mount, depth
• 200kHz, 14°, plastic, transom mount, depth, temp
• 200kHz, 14°, plastic, transom mount, depth, temp, speed
• 200kHz, 8°, plastic, transom mount, depth, temp
• 200kHz, 8°, plastic, transom mount, depth, temp, speed
• 200kHz, 12°, bronze, thru-hull mount, depth
• 200kHz, 12°, bronze, thru-hull mount, depth, temp
• 200kHz, 9°, bronze, thru-hull mount, depth, temp, speed
• 200kHz, 12°, plastic, thru-hull mount, depth
• 200kHz, 12°, plastic, thru-hull mount, depth, temp
• 200kHz, 14°, plastic, in-hull mount, depth
• 200kHz, 14°, plastic, trolling motor mount, depth, temp
Introduction

Selecting a Transducer

Wide cone angle
Narrow cone angle
dead zone
X
fish not seen
X
v