V: Air. Part 1
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How to use pioneer bubble sextant with and without bubble horizon and without averaging device; optical and bubble horizon systems; how to read scale. The Pioneer Bubble Sextant, Mar
Complete catalog record
Series: Navigation Series
Film number: MN 83-ab
Type: Motion Picture
Film number: MN 83-ab
Type: Motion Picture
Sources
- 3434 U.S. Government Films — title, year, creator, length, format, description, catalog record
Record added 2026-07-13 14:19:23