AIM 5-5-4

Pilot. Be aware that the controller issues clearance for approach based only on known traffic.

Follows the procedure as shown on the IAP, including all restrictive notations, such as: Procedure not authorized at night;

Approach not authorized when local area altimeter not available;

Procedure not authorized when control tower not in operation;

Procedure not authorized when glide slope not used;

Straight‐in minimums not authorized at night; etc.

Radar required; or

The circling minimums published on the instrument approach chart provide adequate obstruction clearance and pilots should not descend below the circling altitude until the aircraft is in a position to make final descent for landing. Sound judgment and knowledge of the pilot's and the aircraft's capabilities are the criteria for determining the exact maneuver in each instance since airport design and the aircraft position, altitude and airspeed must all be considered. REFERENCE-

AIM, Para 5-4-20 , Approach and Landing Minimums.

Upon receipt of an approach clearance while on an unpublished route or being radar vectored: Complies with the minimum altitude for IFR; and

Maintains the last assigned altitude until established on a segment of a published route or IAP, at which time published altitudes apply.

There are currently two temperature limitations that may be published in the notes box of the middle briefing strip on an instrument approach procedure (IAP). The two published temperature limitations are: A temperature range limitation associated with the use of baro-VNAV that may be published on a United States PBN IAP titled RNAV (GPS) or RNAV (RNP); and/or

A Cold Temperature Airport (CTA) limitation designated by a snowflake ICON and temperature in Celsius (C) that is published on every IAP for the airfield.

Any planned altitude correction for the intermediate and/or missed approach holding segments must be coordinated with ATC. Pilots do not have to advise ATC of a correction in the final segment. REFERENCE-

AIM, Chapter 7 , Section 3 , Cold Temperature Barometric Altimeter Errors, Setting Procedures, and Cold Temperature Airports (CTA).

Controller. Issues an approach clearance based on known traffic.

Issues an IFR approach clearance only after the aircraft is established on a segment of published route or IAP, or assigns an appropriate altitude for the aircraft to maintain until so established.