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Sonar Overview
CHIRP MEGA Side Imaging Sonar (XM 14 20 MSI T)
C
HIRP MEGA Side Imaging sonar provides Side Imaging sonar, Down Imaging
sonar, and DualBeam PLUS sonar on the control head.
Side Imaging sonar (shown in blue) uses two very precise sonar beams that are
aimed at right angles to the path of the boat. The side beam coverage is very
thin from front to back, yet very wide from top to bottom. The beams provide thin
slices of the bottom for high resolution imaging.
The Side Imaging beams can be operated at one of three display frequencies:
MEGA, 455 kHz, or 800 kHz. Select MEGA for the sharpest image with the highest
resolution for up to approximately 250 feet side to side. Select 800 kHz as an
alternative to the MEGA frequency, and select 455 kHz for greater bottom
coverage at approximately 800 feet side to side.
The Down Imaging beams (shown in green) point down and scan the water with
razor-thin, high definition beams. The beams are wide side to side, but very thin
from front to back. The beams can be operated at one of three display
frequencies: MEGA, 455 kHz, or 800 kHz. Select MEGA for the sharpest image
with the highest resolution for up to approximately 125 feet. Select 800 kHz as
an alternative to the MEGA frequency, and select 455 kHz for the best overall
image quality and depth at 400 ft.
The DualBeam PLUS sonar beams (shown in magenta and yellow) provide conical
coverage directly below the boat. DualBeamPLUS sonar returns are displayed on
the Sonar (2D) Views. The beams can be blended together, viewed separately, or
compared side-by-side.
CHIRP sonar allows you to operate the beams at different frequency ranges (see
Installation Information: Set up or Change Transducer Settings). CHIRP sonar
sends continuous sonar pulses at varying frequencies to provide more detailed
returns and better target separation.
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