OBSTRUCTION IDENTIFICATION SURFACES
FEDERAL AVIATION REGULATIONS PART 77
DIM ITEM DIMENSIONAL STANDARDS (FEET)
VISUAL RUNWAY NON - PRECISION
INSTRUMENT RUNWAY
PRECISION
INSTRUMENT
RUNWAY
PIR
A B A B
C D
A WIDTH OF PRIMARY SURFACE AND APPROACH SURFACE WIDTH AT INNER END 250 500 500 500 1,000 1,000
B RADIUS OF HORIZONTAL SURFACE 5,000 5,000 5,000 10,000 10,000 10,000


VISUAL
APPROACH
NON - PRECISION
INSTRUMENT APPROACH
PRECISION
INSTRUMENT
APPROACH
A B
A B C D
C APPROACH SURFACE WIDTH AT END 1,250 1,500 2,000 3,500 4,000 16,000
D APPROACH SURFACE LENGTH 5,000 5,000 5,000 10,000 10,000 *
E APPROACH SLOPE 20:1 20:1 20:1 34:1 34:1 *

Textual description of the FAR Part-77 surfaces

3D-Diagram of FAR Part-77 surfaces

Plan view of FAR Part-77 surfaces

3D Flythrough of FAR Part 77 surfaces (13,082 Kb)