This paper investigates the wake of a one-inch diameter cylinder in detail and analyzes the effects of turbulence on profile drag determination by the wake-survey method. Pitot probes with various nose shapes were used to measure the total and static pressure, while an x-hotwire was used to determine the three components of turbulence in the wake. The effects of turbulence on the pressure measurement were also considered. A new drag equation, which was derived from van Dam's profile drag equation and suitable for surveying 3D highly turbulent wakes, was presented. Jones' equations were transformed to the same form as the present equation to estimate the implicit effects of turbulence on the drag determination. The results indicate that, by including the turbulence effects in the wake integral equation, the profile drag can be determined with good accuracy using the wake-survey method.