What is a patent foramen ovale (PFO)? In about 25% to 33% of people (that is, one in three to four individuals), the foramen ovale tissue flap does not close completely. When the foramen ovale remains open, it is called a â patent foramen ovaleâ or PFO. A PFO can allow a small amount of blood to pass from the right side of the heart to the left side
the minimum necessary standard is intended to be consistent with and not override professional judgment and standards and that practices must implement policies and procedures based on their own assessment of what phi is reasonably necessary for a particular purpose
So I'm confused as to what the alternate minimums are on the approch chart booklets. I know standard minimums are 800-2 and 600-2 for non-precision and precision approaches but alternate minimums are published for many airports.nswers. Best Answer: Standard alternate minimums are not published. They are a 600-foot ceiling and 2-SM visibility for precision approaches, and 800 feet and 2 SM for non-precision approaches.