I can obviously agree with that (as C and D are mine and A and B from the manual, but what you're saying there is that the NOAA diving manual is just wrong.
What you're saying there is that feet transform to "feet of salt water" in a relation of 1:1 but that doesn't apply to meters?!
I don't think feet, as a unit, have the inherent capability of always matching 1:1 with fsw while meters have a 0,305:0,307 relationship with msw.
Again, what you're saying there is that water is calculated in feet, giving a 1:1 relation between f and fsw, and then translated to meters, which gives 0,305m:0,307msw. As if feet were, somehow, the right way to measure water.
So, to wrap this up in a single question:
Is really, as implied by the quote, the relation between feet and feet of salt water 1:1, while the relation between meters and meters of salt water 0,305:0,307?