(1) When operating below 18,000 feet MSL and— (i) On a magnetic course of zero degrees through 179 degrees, any odd
290 (such as flight level 290, 330, or
Dec. 17, 2003; Amdt. 91-296, 72 FR 31679,
370); or
June 7, 2007
(ii) On a magnetic course of 180 degrees through 359 degrees, any flight
§103.17 Operations in certain airspace. No person may operate an ultra-
thousand foot MSL altitude (such as
level, at 4000-foot intervals, begin-
3000, 5000, or 7000); or
ning at and including flight level 310
light vehicle within Class A, Class B,
(such as flight level 310, 350, or 390).
Class C, or Class D airspace or within
(ii) On a magnetic course of 180 degrees through 359 degrees, any even
(4) When operating at flight level
the lateral boundaries of the surface
thousand foot MSL altitude (such as
290 and above in airspace desig-
area of Class E airspace designated
2000, 4000, or 6000).
nated as Reduced Vertical Separation
for an airport unless that person has
Minimum (RVSM) airspace and—
prior authorization from the ATC
(2) When operating at or above 18,000 feet MSL but below flight level 290, and— (i) On a magnetic course of zero
(i) On a magnetic course of zero degrees through 179 degrees, any odd flight level, at 2000-foot intervals
degrees through 179 degrees, any odd
beginning at and including flight level
flight level (such as 190, 210, or 230); or
290 (such as flight level 290, 310, 330,
(ii) On a magnetic course of 180 de-
350, 370, 390, 410); or
facility having jurisdiction over that airspace. Amdt. 103-17, 56 FR 65662, Dec. 17, 1991 §103.23 Flight visibility and cloud clearance requirements. No person may operate an ultra-
grees through 359 degrees, any even
(ii) On a magnetic course of 180
flight level (such as 180, 200, or 220).
degrees through 359 degrees, any
light vehicle when the flight visibility or distance from clouds is less than
(3) When operating at flight level
even flight level, at 2000-foot intervals
290 and above in non-RVSM airspace,
beginning at and including flight level
that in the table found below. All
and—
300 (such as 300, 320, 340, 360, 380,
operations in Class A, Class B, Class
400).
C, and Class D airspace or Class E air-
(i) On a magnetic course of zero degrees through 179 degrees, any
Doc. No. 18334, 54 FR 34294, Aug. 18,
space designated for an airport must
flight level, at 4000-foot intervals,
1989, as amended by Amdt. 91-276, 68
receive prior ATC authorization as
beginning at and including flight level
FR 61321, Oct. 27, 2003; 68 FR 70133,
required in §103.17 of this part.
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