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Garmin GPSMAP 182C User Manual

Page 88

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GPSMAP 182/182C Owner’s Manual

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Whiteline—controls how the unit displays

information about the bottom type (hard or soft).

With the Whiteline off, the bottom return displays

as red and contains no information on bottom

hardness. With Whiteline set at Normal or 1-100%,

the bottom return becomes white with a red line

indicating where the water meets the bottom. To

turn the Whiteline off, press the

ROCKER down

until the setting bar is all the way at the bottom of

the range and reads off. See page 91 for more detail

on this feature.

Frequency—allows you to choose a transducer

frequency. Frequency refers to the pitch of the

sound that the transducer sends and receives.

Choose between 200kHz, 50kHz, or Dual

frequency.

Depth Line—adds a horizontal depth line across

the display that is used to measure the depth of

underwater objects. The depth of the line appears

in a box on the right side of the line. Press up or

down on the ROCKER to control the position of

the line on the graph. The depth is displayed in a

window on the right side of the line. To turn the

Depth Line off, press the ROCKER up until the

setting bar is all the way at the top of the range

and reads off.

Noise Reject—helps filter unwanted noise from

the graph. The Noise Reject tool can be turned off,

set to Normal (automatically adjusts for optimum

viewing), or to a fixed 1-100% setting. When

setting the Noise Reject tool, the HIGHER the

noise rejection setting, the less likely the unit is

to NOT show fish or structure. To turn the Noise

Reject off, press the

ROCKER down until the

setting bar is all the way at the bottom of the range

and reads off.

Whiteline

Adjustment

Frequency

Adjustment

Depth Line

Adjustment

Noise Reject

Adjustment