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42.4.1 Pilot
42.4.1.1 Be aware that the controller issues clearance for approach based only on known traffic.
42.4.1.2 Follows the procedures as shown on the instrument approach chart including all restrictive notations, such as:
a) Procedure not authorized at night.
b) Approach not authorized when local area altimeter not available.
c) Procedure not authorized when control tower not in operation.
d) Procedure not authorized when glide slope not used.
e) Straight.in minimums not authorized at night.
f) Radar required.
g) The circling minimums published on the instrument approach chart provide adequate obstruc-tion clearance. The pilot 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 a pilot to determine the exact maneuver in each instance since airport design and the aircraft position, altitude, and airspeed must all be considered. (See ENR 1.5, paragraph 11.6, Circling Minimums.)
42.4.1.3 Upon receipt of an approach clearance while on an unpublished route or being radar vectored:
a) Complies with the minimum altitude for IFR.
b) Maintains last assigned altitude until estab-lished on a segment of a published route or Instrument Approach Procedure (IAP), at which time published altitudes apply.
42.4.2 Controller
42.4.2.1 Issues an approach clearance based on known traffic.
42.4.2.2 Issues an IFR approach clearance only after aircraft is established on a segment of published route or IAP; or assigns an appropriate altitude for the aircraft to maintain until so established.
42.5 Missed Approach
42.5.1 Pilot
42.5.1.1 Executes a missed approach when one of the following conditions exist:
a) Arrival at the missed approach point (MAP) or the decision height (DH) and visual reference to the runway environment is insufficient to complete the landing.
b) Determines that a safe approach or landing is not possible (see ENR 1.5 paragraph 27.8).
c) Instructed to do so by ATC.
42.5.1.2 Advises ATC that a missed approach will be made. Include the reason for the missed approach unless initiated by ATC.
42.5.1.3 Complies with the missed approach instruc-tions for the IAP being executed from the MAP, unless other missed approach instructions are specified by ATC.
42.5.1.4 If executing a missed approach prior to reaching the MAP, fly the lateral navigation path of the instrument procedure to the MAP. Climb to the altitude specified in the missed approach procedure, except when a maximum altitude is specified between the final approach fix (FAF) and the MAP. In that case, comply with the maximum altitude restriction. Note, this may require a continued descent on the final approach.
42.5.1.5 Following a missed approach, requests clearance for specific action; i.e., another approach, hold for improved conditions, proceed to an alternate airport, etc.
42.5.2 Controller
42.5.2.1 Issues an approved alternate missed ap-proach procedure if it is desired that the pilot execute a procedure other than as depicted on the instrument approach chart.
42.5.2.2 May vector a radar identified aircraft executing a missed approach when operationally advantageous to the pilot or the controller.
42.5.2.3 In response to the pilot’s stated intentions, issues a clearance to an alternate airport, to a holding fix, or for reentry into the approach sequence, as traffic conditions permit.
42.6 Radar Vectors
42.6.1 Pilot
42.6.1.1 Promptly complies with headings and altitudes assigned to you by the controller.
42.6.1.2 Questions any assigned heading or altitude believed to be incorrect.
42.6.1.3 If operating VFR and compliance with any radar vector or altitude would cause a violation of any Federal Aviation Regulation, advises ATC and obtain a revised clearance or instruction.
42.6.2 Controller
42.6.2.1 Vectors aircraft in Class A, B, C, D, and E airspace: a) For separation. b) For noise abatement.
c) To obtain an operational advantage for the pilot or the controller.
42.6.2.2 Vectors aircraft in Class A, B, C, D, E, and G airspace when requested by the pilot.
42.6.2.3 Vectors IFR aircraft at or above minimum vectoring altitudes.
42.6.2.4 May vector VFR aircraft, not at an ATC assigned altitude, at any altitude. In these cases, terrain separation is the pilot’s responsibility.
42.7 Speed Adjustments
42.7.1 Pilot (In U.S. Domestic Class A, B, C, D, and E airspace)
42.7.2 Except as stated in paragraphs 42.7.5 and 42.7.6, advises ATC anytime the true airspeed at cruising level varies or is expected to vary by plus or minus 10 knots or 0.02 Mach number, whichever is less, of the filed true airspeed.
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