Use GPS satellites - should be normally enabled, but you may consider disabling it if this interferes with your navigation software.
Volume of capture sounds - in some countries/jurisdictions the shutter sound is mandatory for hardware manufacturers, to prevent/limit spy photos and videos. But, this sound can quickly become annoying when you hear it repeatedly, as each video file is generated. So, in Voyager you have the option to turn down the volume, or turn the sound off completely. Warning: This controls a class of system sounds, so it may affect the sounds in other apps, too! E.g. Google Maps may be silenced. However, there is a solution for rooted devices.
Screen brightness - while driving in the dark, it can be useful to reduce the brightness level of the main screen. And even in daylight, a low brightness level is preferable for both the screen and battery.
Auto reverse geocode - this operation consumes from your Internet bandwidth (data plan), as each file's GPS coordinates are transformed into a street address. Temporary video files are excluded from reverse geocoding, though. You can also perform this operation manually just on selected files, using the "Look up address" option from the context menu.