Custom Landing System Protection Protect your landing system from the elements with a PORTaPiT custom weather cover or ground cover. Be sure to include exact dimensions of your exisiting landing system or call for assistance. New and improved weather cover system has "D" Rings for fastening to bottom of landing system. Standard Colors: Royal Blue, Red, Black, Dark Green, Gold, Yellow, Columbia Blue, Purple, Orange, Maroon, Kelly Green and White.