Double R Solutions Fishing Solutions

Fishing Solutions Double R Solutions

Experts in Lowrance electronics. Providing installation, training, and products to help you fish better




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SonarCards™ is a tool that you use to help you better operate your Sonar/GPS unit on your boat. It is like having a sonar guru sitting next to you, telling you to hit this button and/or that button to perform a particular function like loading waypoints or setting up your unit. SonarCards™ give you step by step button or touch sequences without having to look it up in the manual and then hope you interpret it correctly. The manufacturer’s manuals are great reference tools but not when you’re on the water and need to get something done quickly and with confidence. That is when SonarCards™ can help you.

Each version of SonarCards™ contains card packages for a specific fishfinder/chartplotter unit manufacturer. either Lowrance HDS® or Lowrance HDS® Touch fishfinder/chartplotter units. Other products will be available in the near future for those with different manufacturers. Each version gives the purchaser access to all of the packages for that manufacturer.

This application runs on phone and tablet devices. Since all of the information is stored locally on your device, it will work whether or not you have cell network coverage.

Lowrance Version

The Lowrance version of SonarCards includes card packages specific to Lowrance units. All of the following card packages are include in this version.


SonarCardscontains several features that help the user select and go to a topic that they need help.

  • Each version of SonarCards contains card sets for all of the specific manufacturer units. This is useful for users that have multiple units or those that have older units and are planning to upgrade to newer units without having to purchase another copy of the program.
  • Once a card set is selected then the user simply swipes to the next or previous card to locate what they are looking for. This is useful when the user is gaining early knowledge of the unit.
  • Cards contain mostly the button or touch steps to perform the desired operation.
  • Cards are color coded and organized by categories such as Sonar, Chart, Overall.
  • There are popup windows that show items such as buttons or screen captures on the units for additional help.

Other Features

Table of Contents (new for v 1.2.0)

The Table of Contents or TOC feature allows the user to quickly locate a topic rather than going through the card set.

To access the Table of Contents for the current card set, tap on the Table of Contents Icon. Icon for Table of Contents
The categories are now displayed for the current card set, then tap on the desired category. Table of Contents Popup
Tap on the desired topic. Icon for Table of Contents
And the desired topic will be shown in the application window. Icon for Table of Contents


There are several tools available to the user. Currently there are 2 tools. One performs conversion of GPS coordinates into values that can be used for Sonar/Mapping units.

To access the Tool, tap on the Tools Icon. Tools Icon

Convert GPS Coordinates

The GPS Coordinate Converter tool is used to convert GPS coordinates into values that the user can directly input in their GPS mapping unit. This tool is useful when they are obtaining coordinates from sources such as Google Maps during map study.

This tool can be accessed by the Tools Icon or within a card set as it is linked into one or more cards.

This shows accessing the GPS Coordinate Converter Tool from a card. Simply, tap on "Click here for Conversion Tool"

Access Tool from Card

The GPS Coordinate Converter Tool is now shown. You'll need to enter both coordinates.

Initial Convertor Tool Window

Next, input the coordinate. Note, the keypad may be different depending on your device (phone or tablet). When you have entered both values, tap on the Convert button.

Inputing Coordinate into the Tool

Your coordinates are now converted so that you can manually enter them into your GPS unit.

Converted Coordinate

Transducer Cone Angle

The Tranducer Cone Angle tool is used for showing the bottom coverage for a transducer. The user selects the transducer from a list of transducer. Then they select the operating frequency. The application remembers the settings. Then the depth and range are set, and the bottom coverage is shown either in feet or meters. The tool works in either portrait or landscape mode.

Transducer Cone Angle Tool Portrait Transducer Cone Angle Tool Landscape