Zoom (Setting Not Saved In Memory); Chart Speed (Setting Saved In Memory) - Humminbird PiranhaMAX 155 Installation And Operation Manual

Press the POWER-MENU key until ZOOM appears. Select Auto to magnify the
area around the bottom in order to reveal fish and structure close to the bottom
that may not be visible during normal operation. When ZOOM is set to Auto, the
upper and lower Depth Ranges are automatically adjusted to keep the area above
and below the bottom on the display. Select Off to return to normal operation.
(Off, Auto, Manual Ranges, Default = Off)
magnified bottom
with more detail
There is also a series of manual ranges which can be selected. The manual
depth ranges are determined by the present depth conditions.
Press the POWER-MENU key until CHART SPEED appears. Select a setting
from 1-5 to increase or decrease the chart speed, where 1 is the slowest and
5 is the fastest chart speed. Chart speed determines the speed at which the
sonar information moves across the display, and consequently the amount of
detail shown.
A faster speed shows more information and is preferred by most anglers;
however, the sonar information moves across the display quickly. A
slower speed keeps the information on the display longer, but the bottom
and fish details become compressed and may be difficult to interpret.
(1 to 5, Default = 5)
Zoom
(Setting Not Saved in Memory)
Chart Speed
(Setting Saved in Memory)
45
upper
zoom range
structure
lower
zoom range
The Menu System