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Alarms Tab
Contains settings for the unit’s alarms. (For a list of alarms and unit messages, see page 28.) The Alarms
Tab is divided into two submenu tabs: Sonar alarms and System alarms.
Sonar alarms:
• Fish — sets alarm/icon to sound/display when unit detects a fi sh of the specifi ed symbol size.
• Shallow Water/ Deep Water — set alarms to sound when you enter an area of specifi ed depth that
is too shallow and/or too deep.
• Drift — sets an alarm to sound when you’ve exceeded a specifi ed drift depth range. For example, if
the value is set to 5 ft. and the current depth is 20 ft., the alarm will sound if the unit detects a depth
greater than 25 ft. or shallower than 15 ft.
• Water Temperature — sets an alarm to sound when the transducer reports a temperature either
above, below, inside or outside the specifi ed values.
System alarms:
• Battery — sets an alarm to sound when the battery is reaching a critical state of discharge.
• Timer — allows you to choose between a Count Dn (Down) or Count Up timer. You may specify a
duration for the Count Dn (Down), Stop, or Reset the timer.
To set an alarm:
1. Use the ARROW keys to highlight desired submenu tab of the Alarms Tab.
2. Highlight the fi eld below the alarm name you wish to activate and press ENTER.
3. Change the mode to the desired setting and press ENTER.
4. Highlight the next fi eld to the right and press ENTER, then enter the desired settings and press
ENTER to fi nish.
5. If you want the alarm to display and beep until acknowledged, highlight the ‘Persist’ box and press
ENTER to place a check mark in the box.
Unit Operation
Main Menu Options
Main Menu -
Alarms/Sonar Tab
Main Menu -
Alarms/System Tab
250C Manual.indd 19 1/27/2004, 3:55:13 PM