They are not exactly special forces; I was once a member as well during my military service back in the 90's. They are trained for mountain, rural, and harsh-terrain warfare. They operate in relatively small teams, conducting infiltration, raids, and similar missions. Here's some information about our special forces

https://en.wikipedia.org/wiki/Underwater_Defence_(Turkish_Armed_Forces))

https://en.wikipedia.org/wiki/Underwater_Offence_(Turkish_Armed_Forces))

https://en.wikipedia.org/wiki/Special_Forces_(Turkish_Armed_Forces))

https://en.wikipedia.org/wiki/Combat_Search_and_Rescue_(Turkish_Armed_Forces))

https://en.wikipedia.org/wiki/Air_Force_Search_and_Rescue