Don't know about Scotty, but the U.S. Fifth Fleet was in the Med, about 1 hour away by jet. Combined Task Force 150 and Combined Task Force 158 were 45 minutes away by helicopter. There was also a team of Special Forces already on a C-130 in Tripoli ready to go.
Don't know if they would have made a difference, but they were never even dispatched, and I believe, they were even told to stand down.
https://www.cbsnews.com/news/diplomat-us-special-forces-told-you-cant-go-to-benghazi-during-attacks/