what are the main differences between a visual approach and a contact approach? a. the pilot must request a visual approach and report having the field in sight; atc may assign a contact approach ifr vfr conditions exist. b. the pilot must request a contact approach; the pilot may be assigned a visual approach and higher weather minimums must exist. c. anytime the pilot reports the field in sight, atc may clear the pilot for a contact approach; for a visual approach, the pilot must advise that the approach can be made under vfr conditions.