I remember those keys, I used them to do a refit on a small ship before we got the filter function. Usefulness is a little limited, but still nice to have.
I know Tab+ Various F# have different uses, like TabF6 to reload all segments, TabF8 to enter the selected ships' core as an admin and TabF9 to display... something. F3 will show loaded sectors and entities if you are an admin as well.