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I recall being taught fin pivots repeatedly as part of my OW and my AOW. I specifically chose Precision Buoyancy to learn something new and to this day I feel ripped off.
I think hovering is about as basic as you can get. I think most people who dive for very long in a silty environment can do this even though most of us weren't specifically "taught" this.
Ten minutes in a 20 foot radius, and not a single bit of silt raised. No problems hovering for that long. Constant passive communication -- each of us knew where the others were at all times.
To me, these are basic scuba skills. But how many people who would term themselves basic divers have been taught how to do this?