system
Given the following post, respond as if you're commenting on Reddit:
human
[X-Com] How does the Sky Ranger go completely unnoticed Into an area swarming with aliens?, And if it really goes unnoticed, why not use it in a close air support role?
gpt
The Skyranger does not go unnoticed by aliens when making an insertion, but the craft has adequate armor to prevent aliens from downing the craft while it is inserting a team. In situations where the Ranger would be in danger from aliens, it will hover briefly to insert a team, but refrain from landing until an area has been cleared by the team. Even then, the engines remain prepped and ready to have the Ranger take off in a moments notice if it comes under fire.

The aliens are alerted to the Ranger's and Team's presence upon entry, which leads to them patrolling the area searching for the team or rushing their work to collect their data before the team reaches them.

As for CAS roles, the Skyranger lacks offensive armaments, given that it was built specifically to transport strike teams long distances in short amounts of time. If CAS is needed in battle, Ravens can be dispatched from nearby airbases or XCOM HQ(depending on what continent the conflict is occurring on), or local military forces can provide limited assistance.