Patent ID: 7370790
Filing Date: 2008-05-13
Classification: G01C

Abstract:
1. 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, 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, 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.