Haiyang HFF-650, Manual

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Operation
3. Bottom Lock (200KHz or 50KHz)
Bottom Lock divides the Fishfinder main screen image for the selected Fishfinder into two sections.
The left hand section displays a Normal Mode image. The right hand section of the screen displays the
Fishfinder image relative to the sea bottom. The sea bottom appears as a straight line with the
Fishfinder image magnified for a short distance toward the surface. A scale
appears on the right for estimating distances of echoes near the bottom. Use the Fishfinder Manu to
set the magnified Bottom range from 2.5 to 20m (10 to 60ft.). Default setting is 10m (40ft.). If the depth
Range is set manually, the setting must place the sea bottom echo in the
lower portion of the screen for Bottom Lock to be effective.
Fishfinder modes are selectable for single frequency or dual and some functions, for example bottom
zoom or lock.
4. Normal (200KHz and 50KHz)
The high frequency (200KHz) displays on the left and the low frequency (50KHz) Normal displays on
the right, which increase the accuracy of a fish school and your decision to catch fishes.
5. Bottom Zoom (200KHz and 50KHz)
The high frequency (200KHz) displays on the left and the low frequency (50KHz) Bottom Zoom
displays on the right, which increase the accuracy of a fish school and your decision to catch fishes.