and add the appropriate number of feet specified in Table 8-3, according to the current
reported altimeter setting.
Current altimeter setting
29.92 (or higher)
29.91 through 29.42
29.41 through 28.92
28.91 through 28.42
28.41 through 27.92
27.91 through 27.42
27.41 through 26.92
Table 8-3 -- Altimeter settings (adjustment factor)
Compliance with ATC Instructions
When an ATC clearance has been obtained, no pilot in command may deviate from that
clearance unless an amended clearance is obtained, an emergency exists, or the
deviation is in response to a traffic alert and collision avoidance system resolution
advisory. However, except in Class A airspace, a pilot may cancel an IFR flight plan if
the operation is being conducted in VFR weather conditions. When a pilot is uncertain
of an ATC clearance, that pilot shall immediately request clarification from ATC.
Except in an emergency, no person may operate an aircraft contrary to an ATC
instruction in an area where air traffic control is exercised.
Each pilot in command who deviates from an ATC clearance or instruction in an
emergency or in response to a traffic alert and collision avoidance system resolution
advisory shall notify ATC of that deviation as soon as possible.
Each pilot in command who (though not deviating from a rule of this subpart) is given
priority by ATC in an emergency shall submit a detailed report of that emergency within
48 hours to the manager of that ATC facility if requested by ATC.
Unless otherwise authorized by ATC, no person operating an aircraft may operate that
aircraft according to any clearance or instruction that has been issued to the pilot of
another aircraft for RADAR air traffic control purposes.