Patent ID: 7370790

Claim:
An apparatus for determining and visualizing a holding pattern and a holding entry, the apparatus comprising: a base having a top edge and configured to be secured to a kneeboard; a disk having a first surface, a second surface distal the first surface, and degree indicia imprinted on the first and second surfaces of the disk, the degree indicia including a symbol representing North; a first disk overlay substantially transparent and imprinted with indicia representing a holding fix, a holding radial, a right holding pattern, and for the right holding pattern a teardrop initial heading, a teardrop entry path, a parallel entry path, a parallel final intercept course, a teardrop entry region, a parallel entry region, and a direct entry region, the first disk overlay rotatably affixed to the disk first surface at about a center of the disk, the first disk overlay configured for easy rotation by one hand for alignment of the holding radial with a predetermined degree on the disk first surface; a second disk overlay, substantially transparent and imprinted with indicia representing a holding fix, a holding radial, a left holding pattern, and for the left holding pattern a teardrop initial heading, a teardrop entry path, a parallel entry path, a parallel final intercept course, a teardrop entry region, a parallel entry region, and a direct entry region, the second disk overlay rotatably affixed to the disk second surface at about the center of the disk, the second disk overlay configured for easy rotation by one hand for alignment of the holding radial with a predetermined degree on the disk second surface; and two connecting brackets pivotally attached at one end to the base and pivotally attached at another end to the disk, the axis of pivot of the disk about the connecting brackets being offset from the center of the disk, wherein the disk may be easily pivoted by one hand to dispose the disk first surface distal the base or to dispose the disk second surface distal the base, and wherein the symbol representing North is proximate the top edge of the base when the disk first surface is distal the base and the symbol representing North is proximate the top edge of the base when the disk second surface is distal the base.