Section 91.175

14 CFR Ch. I (1-1-19 Edition)

(3) Except as provided in paragraph
(f)(4) of this section, no pilot may takeoff under IFR from a civil airport having published obstacle departure procedures (ODPs) under part 97 of this
chapter for the takeoff runway to be
used, unless the pilot uses such ODPs
or an alternative procedure or route assigned by air traffic control.
(4) Notwithstanding the requirements
of paragraph (f)(3) of this section, no
pilot may takeoff from an airport
under IFR unless:
(i) For part 121 and part 135 operators, the pilot uses a takeoff obstacle
clearance or avoidance procedure that
ensures compliance with the applicable
airplane performance operating limitations requirements under part 121, subpart I or part 135, subpart I for takeoff
at that airport; or
(ii) For part 129 operators, the pilot
uses a takeoff obstacle clearance or
avoidance procedure that ensures compliance with the airplane performance
operating limitations prescribed by the
State of the operator for takeoff at
that airport.
(g) Military airports. Unless otherwise
prescribed by the Administrator, each
person operating a civil aircraft under
IFR into or out of a military airport
shall comply with the instrument approach procedures and the takeoff and
landing minimum prescribed by the
military authority having jurisdiction
of that airport.
(h) Comparable values of RVR and
ground visibility. (1) Except for Category
II or Category III minimums, if RVR
minimums for takeoff or landing are
prescribed in an instrument approach
procedure, but RVR is not reported for
the runway of intended operation, the
RVR minimum shall be converted to
ground visibility in accordance with
the table in paragraph (h)(2) of this section and shall be the visibility minimum for takeoff or landing on that
runway.
(2)
Visibility
(statute
miles)

kpayne on VMOFRWIN702 with $$_JOB

RVR (feet)
1,600
2,400
3,200
4,000
4,500
5,000

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-
-
-
3-4
7-8
1
14
12
58

Visibility
(statute
miles)

RVR (feet)
6,000 ..................................................................

(i) Operations on unpublished routes
and use of radar in instrument approach
procedures. When radar is approved at
certain locations for ATC purposes, it
may be used not only for surveillance
and precision radar approaches, as applicable, but also may be used in conjunction with instrument approach
procedures predicated on other types of
radio navigational aids. Radar vectors
may be authorized to provide course
guidance through the segments of an
approach to the final course or fix.
When operating on an unpublished
route or while being radar vectored,
the pilot, when an approach clearance
is received, shall, in addition to complying with Section 91.177, maintain the last
altitude assigned to that pilot until the
aircraft is established on a segment of
a published route or instrument approach procedure unless a different altitude is assigned by ATC. 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. Upon reaching the final approach course or fix, the pilot may either complete the instrument approach
in accordance with a procedure approved for the facility or continue a
surveillance or precision radar approach to a landing.
(j) Limitation on procedure turns. In
the case of a radar vector to a final approach course or fix, a timed approach
from a holding fix, or an approach for
which the procedure specifies  - No PT, - 
no pilot may make a procedure turn
unless cleared to do so by ATC.
(k) ILS components. The basic components of an ILS are the localizer, glide
slope, and outer marker, and, when installed for use with Category II or Category III instrument approach procedures, an inner marker. The following
means may be used to substitute for
the outer marker: Compass locator;
precision approach radar (PAR) or airport surveillance radar (ASR); DME,
VOR, or nondirectional beacon fixes
authorized in the standard instrument
approach procedure; or a suitable

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