Bubble Sextant

Edwin A. Link, Jr. presented this bubble sextant, in a beautiful alligator case, to P. V. H. Weems. It is a standard A-12 with an attachment that enables the user to view the real horizon. Link applied for a patent on this feature in 1943.
Ref: Link Bubble Sextant (Octant) Model A-12 Handbook: Description, Operation, Use, Adjustment (Binghamton, N.Y.: Link Aviation Devices, Inc., 1943).
Edwin A. Link, Jr., "Navigation Instrument Including a Horizon Attachment," U.S. patent #2,395,559
Object Name
Weems, Philip Van Horn
overall: 4 1/2 in x 13 in x 9 in; 11.43 cm x 33.02 cm x 22.86 cm
associated place
United States
ID Number
catalog number
accession number
See more items in
Armed Forces History: Armed Forces History, Naval
Measuring & Mapping
Time and Navigation
Time and Navigation, National Air and Space Museum
Data Source
National Museum of American History, Kenneth E. Behring Center
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