You need clouds for the table. CY6! Classic rule C2.1 Table Clouds and CY6!-Jet Age rule C7.1 Table Clouds conceal aircraft, prevent firing (guns & IR missiles), and require pre-plotting and Aircrew checks for movement. This can get very interesting in a game.
Cloud Cover is a pack of 23 hexes comprising two each of 5 hex pieces and a single 6 and 7 hex pieces. This is enough for four small clouds around the table or combine for a larger cloud bank. Made out of stiff felt, they are tabletop ready straight from the package!
Mirage F1 and ruler not included.