FR556911A - Improvements to magnetic compasses for marine or aviation - Google Patents

Improvements to magnetic compasses for marine or aviation

Info

Publication number
FR556911A
FR556911A FR556911DA FR556911A FR 556911 A FR556911 A FR 556911A FR 556911D A FR556911D A FR 556911DA FR 556911 A FR556911 A FR 556911A
Authority
FR
France
Prior art keywords
aviation
marine
magnetic compasses
compasses
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Louis-Abel Doignon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR556911A publication Critical patent/FR556911A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
FR556911D 1922-01-12 1922-01-12 Improvements to magnetic compasses for marine or aviation Expired FR556911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR556911T 1922-01-12

Publications (1)

Publication Number Publication Date
FR556911A true FR556911A (en) 1923-07-31

Family

ID=8940478

Family Applications (1)

Application Number Title Priority Date Filing Date
FR556911D Expired FR556911A (en) 1922-01-12 1922-01-12 Improvements to magnetic compasses for marine or aviation

Country Status (1)

Country Link
FR (1) FR556911A (en)

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