Where did Wi-Fi Scan go in OS 10.8.4?

I realize that Wi-Fi Diagnostics was replaced by Wireless Diagnostics in 10.8.4 but where did Wi-Fi Scan go? It was a sub-program of Wi-Fi Diagnostics and I would have thought that it would not have vanished completely from Wireless Diagnostics. On any given day there are 10-15 visible Wi-Fi networks in my community and sometimes I find myself competing with others using the same radio channel that my Time Capsule is set to. If I were experiencing a problem I used Wi-Fi Scan to find a channel that was not being used. Theoretically, setting the Wireless Options in Airport Utility to Automatic should aleviate co-channel interferrence between my Time Capsule's automatic settings and those of my neighbors but that was not always the case. I found that manually finding an unused channel works best for my Time Capsule.