From the HBSI screen This program will convert Humminbird Sonar Recording Files to Humminbird .XTF, YellowFin .872, YellowFin .XTF or Deep Vision Technology (*.dvs) Format for playback on their respective FREE Viewers. When I select the output files I do not see the .xtf format. It is either .872 or .dvs. is this an oversite? Chuck