03-03-2015, 05:49 PM
humminbire uses a 200/83
kHz DualBeam PLUS sonar system with a wide
(60°) area of coverage. DualBeam PLUS sonar has
a narrowly focused 20° center beam, surrounded by
a second beam of 60°, expanding your coverage to
an area equal to your depth. In 20 feet of water, the
wider beam covers an area 20 feet wide.
The 200 kHz frequency has a narrow cone angle, and provides high-precision information about water depth and objects that are in the narrow sonar cone. The 83 kHz frequency provides much wider coverage than the 200 kHz beam,
so the fish you are seeing are over a 100ft in the cone angle and may not be stacked.
The left side shows more fish because of the 83 khz wider angle cone.
this was last oct when the lakers were moving in.
I would not buy a fish finder that did not have DualBeam.
[signature]
kHz DualBeam PLUS sonar system with a wide
(60°) area of coverage. DualBeam PLUS sonar has
a narrowly focused 20° center beam, surrounded by
a second beam of 60°, expanding your coverage to
an area equal to your depth. In 20 feet of water, the
wider beam covers an area 20 feet wide.
The 200 kHz frequency has a narrow cone angle, and provides high-precision information about water depth and objects that are in the narrow sonar cone. The 83 kHz frequency provides much wider coverage than the 200 kHz beam,
so the fish you are seeing are over a 100ft in the cone angle and may not be stacked.
The left side shows more fish because of the 83 khz wider angle cone.
this was last oct when the lakers were moving in.
I would not buy a fish finder that did not have DualBeam.
[signature]