Humminbird 500 SERIES 580 - Manual (Page 84)

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Depth Alarm
Depth Alarm sounds when the depth becomes
equal to or less than the menu setting.
To change the Depth Alarm setting:
1. Highlight Depth Alarm on the Alarms main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Depth
Alarm setting. (OFF, 1 to 100 feet, or 0.5 to 30 meters [International
Models only], Default = OFF)
Fish ID Alarm
Fish ID Alarm sounds when the Fishfinder
detects fish that correspond to the alarm setting. Fish ID Alarm will only
sound if Fish ID+
TM is on.
To change the Fish ID Alarm setting:
1. Highlight Fish ID Alarm on the Alarms main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Fish
ID Alarm setting. (Off, All, Large/Medium, Large, Default = Off)
Large
Large/Medium
All
Off
For example, if you've set the Fish ID Alarm to sound for Large fish only,
the Fish ID alarm will sound when a large-sized fish is detected.