Max Depth (Advanced); Water Type (Advanced) - Humminbird 688ci HD DI Operation Manual

Max Depth controls the maximum depth of operation. When Max Depth is set
to Auto, the Fishfinder will acquire bottom readings as needed (within the
capacity of the unit). When Max Depth is set to match your fishing maximum
depth, your Fishfinder will not attempt to acquire sonar data below that depth,
so more detail will be shown on the screen.
NOTE: If the bottom is deeper than the Max Depth setting, the digital depth
readout will flash, indicating that the Fishfinder cannot locate the bottom.
The available Max Depth settings are determined by your Humminbird® model as
follows:
• 688ci HD: Auto to 1500 ft, Auto to 457 m (International Models only);
Default = Auto
• 688ci HD DI: Auto to 600 ft, Auto to 183 m (International Models only);
Default = Auto
• 688ci HD XD: Auto to 2500 ft, Auto to 762 m (International Models
only); Default = Auto
Water Type configures your unit for operation in fresh or salt water. In salt water,
you can also choose the shallow or deep setting. The Water Type menu option is
available when User Mode is set to Advanced (see Main Menu: User Mode).
NOTE: Make sure that the Water Type is set accurately, especially in salt
water, as this affects the accuracy of deep water depth readings. In salt water,
what would be considered a large fish might be 2 to 10 times bigger than a
large fish in fresh water (depending on the type of fish you are seeking). The
salt water setting allows for a greater range in fish size adjustment to account
for this difference.
Sonar Menu Tab
Max Depth
(Advanced)
Settings: Various, see below.
Water Type
(Advanced)
Settings: Fresh, Salt (shallow), Salt (deep); Default = Fresh
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