If this setting is OFF

• Visible ARRs are loaded when opening a mission.
• When you select a single ARR, only the clicked ARR is updated. 
• This can result in ARRs being out of sync, which you may only notice when clicking on them, but overall loading times will be slightly faster.

If this setting is ON 

• ARRs are loaded when you open a mission.
• When you click on an ARR, all visible ARRs are updated based on the current vehicle selections.
• If you have multiple tabs open, all newly visible ARRs are updated based on the current vehicle selections.
• When you click a vehicle selection box, all visible ARRs are updated based on the current vehicle selections.