This shows landing flap to be selected somewhere along Base Leg with a note that on final that the aircraft should be stabilised on final between 700-500 feet.
Is that a current edition training manual? As far as I know a lot, or most, carriers in the U.S. require 1000' to be configured and perhaps fully stabilized on final.
Some of the best landing/handling flying done is the U.S. is landing to the south at DCA (KDCA) via the River Visual and the Expressway Visual to rwy 31 at LGA. Most pilots don't follow the depicted ground track in LGA. If flown as depicted I've heard FO's say "are we allowed to do this?!?" You roll out at approx. 300' after looking into CitiBank field on the turning descent that's approx. 'base' leg position.
DCA (KDCA) "cleared the visual to runway 01, circle to land runway 33, is also fun. 5100' runway. Mandatory go-around at 1700' (1/3 of landing distance). Weight restricted due to runway length so you're frequently right at the allowed performance limits. There's a blast fence at the end - FO after one landing "that wall was coming up fast."