1973-12-12
1976-04-06
Morrison, Malcolm A.
33270, G01C 2100
Patent
active
039479730
ABSTRACT:
The invention relates to a navigational instrument which can be used as an elementary navigation teaching aid. It can also be used for finding Local Time by apparent sun or by mean sun; finding Greenwich Mean Time (or any other standard zone time) if the longitude is known; finding longitude if Greenwich Mean Time is known; finding latitude; finding the sun's altitude, zenith distance, amplitude and declination; finding the date, finding observer's geographical position by fix; and finding observer's position by land marks. The instrument comprises a base member having a datum such as a meridian line and being capable of being set in a predetermined position, means of measuring the angle between a line of sight from an object and the datum, means of finding local time by the apparent sun which means is rotatably mounted on a pivot on the base member, and a source of reference from which the ephemeris of the sun proper to any day of any year can be obtained. The instrument has the advantage of being robust and simple.
REFERENCES:
patent: 13560 (1855-09-01), Abbott
patent: 100691 (1870-03-01), Trueg
patent: 2207195 (1940-07-01), Guadet
patent: 2440827 (1948-05-01), Marean, Jr. et al.
patent: 2441636 (1948-05-01), Kaufman et al.
patent: 2914853 (1959-12-01), Michell
Krass Errol A.
Morrison Malcolm A.
LandOfFree
Navigation teaching aid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Navigation teaching aid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Navigation teaching aid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1568129