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![The tools of the trade for navigating during launch hydrography theb2236.jpg The tools of the trade for navigating during launch hydrography](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2236.jpg?itok=OCgCYBB8)
Description
The tools of the trade for navigating during launch hydrography.Metallic and plastic three-arm protractors for plotting three-point fixes.Sextant in background.1931 Hydrographic Manual (Image credit: NOAA Central Library)
Credit
NOAA Central Library
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Navigation
3-Point Sextant Fix
Keywords
Charting
Navigation
Visual Signals
Sextant