Combining split beam technology with the company’s own TruEcho CHIRP has enabled Furuno to achieve higher-resolution target images and accurate fish size detection even in situations that require high distance resolution, such as in densely packed marks within the mid-surface layer zone, or to discriminate single fish near the seabed.
The FCV-2100 mark-2 echo sounder displays remarkably accurate fish size measurements in an accessible graph form, measuring size and distribution of fish in the selected school, and displays this information in a format that can be understood at a glance.
‘TruEcho CHIRP technology has improved the accuracy and reliability of fish size measurements and graphs,’ a Furuno representative stated. To accurately measure the reflection intensity of a single fish, it is necessary to measure the direction and position of the single fish within the beam. The split beam method uses four transmitting and receiving channels to accurately identify the direction and position of a single fish within the beam angle, and provides more accurate size of fish than conventional methods.
The FCV-2100 mark2 can measure and display fish sizes in three locations at the same time. This allows the user to compare and analyse fish size and school composition. A scrollback function allows the user to review past images.
By connecting to a high-power DFF3-UHD Network Fish Finder operating at 2kW or 3kW, the reach of the Mark-2 can be extended in deeper water. Up to three echo images at different frequencies can be displayed in one screen. The differences in responses for each fish species are clearly visible at a glance, which helps in identifying and estimating the species. A heave correction function when connected to a satelite compass provides a stabilised rendition of the seabed, without undulations caused by sea conditions.
