Humminbird 100SX manual

Once "Manual" Zoom is selected, the display will appear the same as in "Auto" Zoom, but the zoom range does not change automatically. If further adjustment of the zoom range is necessary, pressing either ARROW button while Zoom is active will move the Zoom range up or down. The Menu returns briefly to show the numeric values as the adjustment is made.

To disable Zoom, press the MENU button until the Zoom menu is onscreen. Use the UP ARROW to highlight Off, and let the menu time out.

When the unit is powered off, the Zoom menu returns to Zoom Off.

Depth Alarm

The 100SX contains an audible alarm to warn you of shallow water depths. The alarm is adjustable from 2' (.6m) to 99' (30m) of depth. When the alarm is enabled, an audible alarm is sounded if the water beneath the boat is equal to or less than the selected alarm depth. Upon activation, the alarm sounds continuously for about 5 seconds, and then intermittently to remind you that you are still in shallow water.

To enable Depth Alarm, press MENU repeatedly until the Depth Alarm menu is on-screen. The Factory Setting is "Off". Use the DOWN ARROW to highlight On. The menu will expand to show the current Depth Alarm setting. Use the UP or DOWN ARROW to set the desired depth for alarm activation.

Once the menu times out, the Depth Alarm is enabled. To further adjust the setting, simply press the UP or DOWN ARROW. The menu appears briefly to indicate the setting. If the alarm is sounding and you want to disable it, use the MENU button to bring the Depth Alarm menu on-screen, and the UP ARROW to highlight "Off".

Fish Alarm

The Fish Alarm alerts you to the presence of fish, or other targets not connected to the bottom. The Fish Alarm has 3 different settings which correspond to the 3 different size fish symbols shown on- screen.

To enable Fish Alarm, press the MENU button repeatedly until the

Fish Alarm menu appears on-screen. The menu shows two options, "Off" (Factory Setting) and "On". Use the DOWN ARROW to highlight "On" and the menu further expands to show the 3 alarm options. The selected setting will be "Large fish only". With this setting, the 100SX alarms on only those targets which are represented by the large fish symbols (see Interpreting the On- Screen Information). Pressing the DOWN ARROW again highlights "large and medium fish" and pressing a third time highlights "large, medium, and small fish). With this setting, any fish symbol appearing on-screen activates the Fish Alarm.