pl23_theb2236.jpg
![The tools of the trade for navigating during launch hydrography theb2236.jpg The tools of the trade for navigating during launch hydrography](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2236.jpg)
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
Credit
NOAA Central Library
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Navigation
3-Point Sextant Fix
Keywords
Charting
Navigation
Visual Signals
Sextant