StacksVerified U.S. regulatory reference

46 CFR §108.233

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Each helicopter deck must be—
    1. (1)At least the size of the rotor diameter of the largest single main rotor helicopter that will be used on the facility; or
    2. (2)If tandem main rotor helicopters use the facility, at least of a size to provide a longitudinal axis of 9/10 the overall length of the helicopter, and a width of 3/4 of the overall length of the helicopter.
  2. (b)Each helicopter deck must be located so as to provide clear approach/departure paths to enable the largest helicopter using the facility to operate in all weather conditions which allow helicopter operations.