Signals and indicators – Indicators – Operator movable
Patent
1976-12-13
1979-02-20
Yasich, Daniel M.
Signals and indicators
Indicators
Operator movable
33 15D, 73178R, 116 26, 116309, G01C 2100, G09F 900
Patent
active
041400771
ABSTRACT:
A portable navigational aid or device for use in a user-sailboat or similar vessel, where the user-sailboat and another approaching boat are traveling along courses which intersect, to indicate readily whether the user-sailboat should have the right-of-way considering the direction of the wind, the angles of approach of the two boats and the local governing rules regarding the right-of-way. The device includes a disc-shaped member which is held on board the user's boat so that an arrow on the disc-shaped member points in the direction of the wind. A marked pivoted indicator dial having a user-boat symbol is pivoted with the disc-shaped member and is oriented such that the user-boat symbol coincides with the direction of travel of the user's boat. With the device so held and oriented, for an approaching vessel the direction of which may coincide with one of a plurality of symbols on the disc-shaped member, a selected window on the disc-shaped member is looked into to view distinguishable annular red and green areas on the dial indicator. A red color visible in a window corresponding to an approaching vessel indicates that the approaching vessel should yield the right-of-way to the user-sailboat. If green, the approaching vessel has the right-of-way, and the user-sailboat should yield.
REFERENCES:
patent: 2912776 (1959-11-01), Koerber
patent: 3373493 (1968-03-01), McDonald
patent: 3432927 (1969-03-01), Springer
patent: 3646681 (1972-03-01), Koenig
patent: 3721007 (1973-03-01), Banner
patent: 3745313 (1973-07-01), Spilhaus
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