Gemini Software Operation Gemini 720is Imaging SonarDocument: 0703-SOM-00002, Issue: 1 36 © Tritech International Ltd.5.2.2. Configuration OptionsThe Configuration Options allow the user to select which Gemini Sonar to use, selectthe Sound Velocity to be used during image processing, modify sonar data rates, and finallyto change the network settings.NoteIn order to communicate with a Gemini Imaging sonar the software must beset to run in Imager mode. This is done by setting the Sonar Type to “Imager”.When changing this setting, the user will be prompted to allow the software torestart. Once the software restarts, all Imager settings and relevant options willbe available.Sonar SelectionThe Sonar ID of the Gemini Sonar is used to determine which sonar will be used as the sourceof images displayed by the software. The Sonar ID is available on the system data area of theAdvanced screen, and should be entered in the Sonar box. The number of sonars can alsobe selected (up to 4) and each can have an ID. If multiple sonars are present the ID selectionfield will change to allow the sonar to be positioned on the display with an offset and rotation.The Gemini software will retrieve the IP address and Subnet Mask for the chosen GeminiSonar (if the sonar is visible to it) and use them to communicate with the Sonar.NoteIf the sonar is operating and Online has been selected then it will not bepossible to change the ID until the sonar is taken off-line.Sound VelocityThe Sound Velocity controls are used to set how the Gemini obtains the sound velocitywhich is used in producing the sonar image. The Gemini can either use a fixed sound velocity(in which case the sound velocity to be used is entered in the Fixed Velocity box belowthe sound velocity selector), or use a measured sound velocity.