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TowerSAFE Objective

Obstructions Defined

Airspace Protected by FAR

FAR Pt. 77.9

FAR Pt. 77.17

FAR Pt 77.19

FAR Pt. 77.21

FAR Pt. 77.23

VFR Traffic Airspace

VFR Defined

Terminal Procedures-TERPS

Air Navigation Facilities

Obstructions

Antenna Side Mount

Antenna Top Mount

Billboards

Bridges

Buildings, Low/High Rise

Towers, Cell/Radio

Water Tanks

Wind Turbines

Cell on Wheels (COWs)

Chimneys

Stacks

Signs

Cranes

Drilling Rigs, Oil/Gas

Workover Rigs, Oil/Gas

Landfills

High Mast Illumination

Power Transmission Lines

Light Poles

Waste Management Facility

Near Airport Obstruction

Other w/ Antenna

Other w/o Antenna

Marking & Lighting

News & Information

Contact Us

FAR 77.23
Helicopters operate in an obstacle rich enviroment

Paragraph 77.23   Heliport Imaginary Surfaces


(a) Heliport primary surface. The area of the primary surface coincides in size and shape
with the designated take-off and landing area
of a heliport. This surface is a horizontal
plane at the elevation of the established
heliport elevation.


(b) Heliport approach surface. The approach surface begins at each end of the heliport
primary surface with the same width as the primary surface, and extends outward and
upward for a horizontal distance of 4,000 feet where its width is 500 feet. The slope of the
approach surface is 8 to 1 for civil heliports
and 10 to 1 for military heliports.


(c) Heliport transitional surfaces These surfaces extend outward and upward from the lateral
boundaries of the heliport primary surface
and from the approach surfaces at a slope
of 2 to 1 for a distance of 250 feet measured
horizontally from the centerline of the primary
and approach surfaces.


 


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