The wind is measured using an anemometer or estimated with a windsock. The airfield has basic landing lights, aircraft parking, windsock, toilets and a water station. A windsock is a conical textile tube that resembles a giant sock. A windsock indicates which direction the wind is coming from. A small airstrip called Windsock Airport also is located not far from the ferry terminal. A fully extended windsock suggests a wind speed of or greater. Trees were felled, potholes filled in and a windsock erected. It has a windsock as a runway feature and an aviation fuel supply. The only navigational aid was a windsock. The runway is unattended, with no buildings or facilities, except a windsock. A cairn several feet high, with a small windsock attached, sits on the highest ground. The windsock on the summit cairn was placed to allow the pilots to judge conditions. During remodeling in 2007 the "13" windsock was removed. A linen windsock was installed at Penshurst in November 1920. The airport's on-site restaurant, the Windsock Restaurant, closed in February 2011.