I'm running carbons with software 18.3-61.1.155 networked through SS3D running 18.3-61.1.123. After I stop logging a sonar file and transfer it to my computer for storage, the time stamp that shows up in Windows explorer says it was created 4 hours later. The time is set correction on my carbons, and when I look at a waypoint on my units, it has the right time listed for when they are created.