Navigation plotter
First Claim
1. A navigation plotter for use with a chart having lines of latitude and longitude to determine distance, true course, speed, and fuel requirements for a trip, said plotter comprising a thin, light weight, plastic with a periphery including at least one straight-edge, said straight-edge having visible distance scales thereon, a reference point at the mid-point of said straight-edge, the remainder of said periphery having angular markings representing the degrees of a compass rose, whereby said distance scales on said straight-edge designate the distance between two points and said angular markings indicate the true course when said reference point is placed on a line of longitude on said chart.
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Accused Products
Abstract
A navigation plotter is made of a thin, flexible, transparent, light weight plastic with a straight-edge. The straight-edge has a distance scale. There is an reference point at the mid-point of the distance scale used to determine true course. The remainder of the periphery has angular markings in the form of a compass rose. A table gives speeds in the x axis and times in the y axis. The table is aligned with the distance scale. A compass rose and a holding pattern with entries are also depicted.
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Citations
11 Claims
- 1. A navigation plotter for use with a chart having lines of latitude and longitude to determine distance, true course, speed, and fuel requirements for a trip, said plotter comprising a thin, light weight, plastic with a periphery including at least one straight-edge, said straight-edge having visible distance scales thereon, a reference point at the mid-point of said straight-edge, the remainder of said periphery having angular markings representing the degrees of a compass rose, whereby said distance scales on said straight-edge designate the distance between two points and said angular markings indicate the true course when said reference point is placed on a line of longitude on said chart.
Specification