When Reverse Sensing Already Is
Many pilots struggle to properly use an HSI when flying a localizer. If you’re inbound to a VOR on a given course, pass the station and proceed outbound, you don’t change the OBS, right? Likewise, when outbound on a localizer, don’t change the OBS, HSI or not. So, similarly, if you’re flying the front course—inbound or past the runway—you select the front course by convention for situational awareness, even though a localizer doesn’t care where the OBS is.