Garmin 188c User Manual

M

AIN

 M

ENU

 > 

H

IWAY

, T

EMP

, 

AND

 S

ONAR

 T

ABS

The Highway tab contains display settings for the Highway Page. 

Refer to the “Highway Page” section on page 

35

. 

The Temperature tab displays the water temperature log. The 

temperature log requires input from a temperature transducer/

sensor. The most recent temperature measured displays on the far 

right side of the chart with the history trailing to the left. The dotted 

lines within the chart indicate intervals in the temperature range 

and the duration of time.
The following settings are available:

•   Temperature Scale—controls the temperature range for 

displaying the log. Select Auto to have the unit automatically 

determine the best range, or select a span of 2, 4, 6, 8, or 10 

degrees.

•   Time Duration—controls the number of temperature 

readings displayed on the log. Shorter time durations display 

a greater the number of log points. Use longer time durations 

to detect temperature trends, instead of immediate readings.

The Sonar tab contains setup options for the Sonar Page. The Sonar 

Page is not active if you do not have a transducer connected. Refer 

to the “Using Sonar” section on 

pages 78-91

 for more information 

on sonar setup options.