Geometrical instruments – Miscellaneous – Light direction
Patent
1979-10-09
1981-06-23
Martin, Jr., William D.
Geometrical instruments
Miscellaneous
Light direction
235 61B, G01C 2120
Patent
active
042742048
ABSTRACT:
An aircraft traffic pattern computer employing a slotted frame having a window surrounded by a compass rose which is movable in relation to the frame about a pivot point, the slotted frame being adapted for holding a placard having a pair of surfaces upon which various aircraft movement patterns are shown about a reference point and a reference line such that alignment of the reference point with the center of the compass rose and alignment of the reference line with the compass rose proper provides at least one selected course heading for an aircraft.
REFERENCES:
patent: 3100601 (1963-08-01), Shapiro
patent: 3110965 (1963-11-01), Kittock
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