Horizontal beamwidth
When the user wishes echoes to be displayed in high resolution, turn R40 on pcb 06P0192 clockwise to sharpen horizontal beamwidth. Do not turn it excessively clockwise, or an echo which should be displayed as a single solid mass may become hollow or split into smaller, fewer masses. Normally, set R40 at the mid- point of its travel.
JP2
HI LO
Photo No. 2058
Figure 3-1 Transceiver unit, cover opened
06P0192
R61
R40
3.3Heading Alignment
1.Locate a target (buoy, etc.) in the bow direction and display it on the screen at close range. The heading alignment is correct when the target is displayed at 12 o’clock on the screen.
Heading
Buoy
12 o'clock position
When
