In this article, you'll find answers to the most common questions about DownScan UnderVision, including how it compares to CHIRP sonar, when to use each sonar mode, and what to expect when interpreting DownScan images.
What is DownScan UnderVision?
DownScan UnderVision is Deeper's optional DownScan sonar module for Deeper Quest. It provides high-definition images of underwater structure, bottom composition, and submerged objects, helping you better understand what is directly beneath the boat.
Unlike CHIRP sonar, which is primarily designed for fish detection and general sonar scanning, UnderVision focuses on structure clarity and underwater detail.
Can I use CHIRP and DownScan at the same time?
No.
CHIRP and DownScan operate as separate sonar modes. You can quickly switch between them in the Fish Deeper app, but only one sonar mode can be active at a time.
Which sonar mode should I use?
Both sonar technologies serve different purposes and are designed to complement each other.
Use CHIRP when you want to:
Search for fish.
Monitor depth changes.
Scan large areas.
Observe fish arches and sonar returns in real time.
Use DownScan when you want to:
Inspect underwater structure.
Understand bottom composition.
Locate hard-bottom areas.
Identify submerged trees, rocks, vegetation, or other underwater objects.
Select precise bait placement locations.
Many anglers switch between both modes during the same session depending on what they are trying to accomplish.
Is DownScan UnderVision better than CHIRP?
No. UnderVision is not a replacement for CHIRP sonar. It is an additional sonar technology designed for different tasks.
CHIRP is optimized for detecting fish and interpreting sonar returns, while UnderVision provides a highly detailed view of underwater structure and bottom features.
Using both technologies together gives you the most complete understanding of what's happening beneath your boat.
Why can't I see fish arches when using DownScan UnderVision?
Fish arches are a characteristic of traditional sonar technologies such as CHIRP.
UnderVision is designed to display detailed underwater images rather than sonar arches. Fish will still be visible, but they usually appear as bright individual targets rather than the familiar arch shapes seen in CHIRP.
For locating fish, CHIRP remains the preferred sonar mode.
Will DownScan UnderVision detect fish?
Yes.
Fish can appear on the DownScan display, but the technology is optimized for structure interpretation rather than fish detection.
If your primary goal is finding fish, CHIRP sonar is the recommended choice.
Why does the same underwater area look different in CHIRP and DownScan?
CHIRP and DownScan process sonar data differently.
CHIRP focuses on detecting fish, depth, and sonar returns, while UnderVision emphasizes bottom detail and underwater structure.
As a result, the same location can appear very different even though both sonar modes are displaying the same underwater environment.
Can I create depth maps while using DownScan UnderVision?
Yes.
Depth mapping continues to work while using UnderVision, allowing you to create bathymetric maps while viewing detailed DownScan imagery.
Can I install the UnderVision module myself?
Yes.
The DownScan UnderVision module is designed for user installation and can be installed without special tools or technical expertise by following the installation guide.
Does UnderVision affect battery life?
UnderVision is powered directly by the Deeper Quest platform.
Battery life may vary depending on your operating conditions, but UnderVision is designed to work seamlessly as part of the Deeper Quest ecosystem.
What is the minimum & maximum scanning depth of UnderVision?
UnderVision can scan at depths from 0.5 m to up to 40 m (1.6 ft to 131 ft) under suitable water conditions, with recommended / optimal performance up to 25 m (82 ft).
Scanning performance may vary depending on factors such as water conditions, bottom composition, and environmental interference.
Can I switch between CHIRP and DownScan during a fishing session?
Yes.
You can switch between CHIRP and DownScan at any time from the Fish Deeper app, making it easy to choose the sonar mode that best suits your current fishing situation.