Sheba, Baby (1975), directed by William Girdler.
Pam Grier, Chicago private eye with a big revolver, returns to home town Louisville to help her father out of a jam: thugs want his business. That doesn't work out so well and she has to climb the thug ladder to deal with Mr Big (who is actually pretty good in a rangey, Sam Elliott sort of way).
Less of everything this time, although the final section with a yacht and speedboats is new -- getting into Bond territory. A few action scenes, but otherwise it's pretty dull. She looks good in a wet-suit.
Several scenes show bemused spectators watching the filming.
This completes the "Fox in a Box" set which includes Coffy (1973) and Foxy Brown (1974). A wasted fourth disc has a grand total of 30 minutes of bad extras.