regulations constituting the type certification basis of the airplane, regardless of whether that speed for a particular airplane
is 1.3 VSO, 1.23 VSR, or some higher speed required for airplane controllability. This speed, at the maximum certificated
landing weight, determines the lowest applicable approach category for all approaches regardless of actual landing weight.

f. When operating on an unpublished route or while being radar vectored, the pilot, when an approach
clearance is received, must, in addition to complying with the minimum altitudes for IFR operations (14 CFR
Section 91.177), maintain the last assigned altitude unless a different altitude is assigned by ATC, or until the
aircraft is established on a segment of a published route or IAP. After the aircraft is so established, published
altitudes apply to descent within each succeeding route or approach segment unless a different altitude is assigned
by ATC. Notwithstanding this pilot responsibility, for aircraft operating on unpublished routes or while being
radar vectored, ATC will, except when conducting a radar approach, issue an IFR approach clearance only after
the aircraft is established on a segment of a published route or IAP, or assign an altitude to maintain until the
aircraft is established on a segment of a published route or instrument approach procedure. For this purpose, the
procedure turn of a published IAP must not be considered a segment of that IAP until the aircraft reaches the
initial fix or navigation facility upon which the procedure turn is predicated.
EXAMPLE-
Cross Redding VOR at or above five thousand, cleared VOR runway three four approach.
or
Five miles from outer marker, turn right heading three three zero, maintain two thousand until established on the localizer,
cleared ILS runway three six approach.
NOTE-
1. The altitude assigned will assure IFR obstruction clearance from the point at which the approach clearance is issued until
established on a segment of a published route or IAP. If uncertain of the meaning of the clearance, immediately request
clarification from ATC.
2. An aircraft is not established on an approach while below published approach altitudes. If the MVA/MIA allows, and ATC
assigns an altitude below an IF or IAF altitude, the pilot will be issued an altitude to maintain until past a point that the
aircraft is established on the approach.

g. Several IAPs, using various navigation and approach aids may be authorized for an airport. ATC may advise
that a particular approach procedure is being used, primarily to expedite traffic. If issued a clearance that specifies
a particular approach procedure, notify ATC immediately if a different one is desired. In this event it may be
necessary for ATC to withhold clearance for the different approach until such time as traffic conditions permit.
However, a pilot involved in an emergency situation will be given priority. If the pilot is not familiar with the
specific approach procedure, ATC should be advised and they will provide detailed information on the execution
of the procedure.
REFERENCE-
AIM, Para 5-4-4, Advance Information on Instrument Approach.

h. The name of an instrument approach, as published, is used to identify the approach, even though a
component of the approach aid, such as the glideslope on an Instrument Landing System, is inoperative or
unreliable. The controller will use the name of the approach as published, but must advise the aircraft at the time
an approach clearance is issued that the inoperative or unreliable approach aid component is unusable, except
when the title of the published approach procedures otherwise allows, for example, ILS or LOC.
i. Except when being radar vectored to the final approach course, when cleared for a specifically prescribed
IAP; i.e., "cleared ILS runway one niner approach" or when "cleared approach" i.e., execution of any procedure
prescribed for the airport, pilots must execute the entire procedure commencing at an IAF or an associated feeder
route as described on the IAP chart unless an appropriate new or revised ATC clearance is received, or the IFR
flight plan is canceled.
j. Pilots planning flights to locations which are private airfields or which have instrument approach
procedures based on private navigation aids should obtain approval from the owner. In addition, the pilot must
be authorized by the FAA to fly special instrument approach procedures associated with private navigation aids
(see paragraph 5-4-8). Owners of navigation aids that are not for public use may elect to turn off the signal for
whatever reason they may have; for example, maintenance, energy conservation, etc. Air traffic controllers are

5-4-30

Arrival Procedures