pl23_theb2235.jpg
![Checking index error of sextants prior to conducting launch hydrography theb2235.jpg Checking index error of sextants prior to conducting launch hydrography](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2235.jpg)
Description
Checking index error of sextants prior to conducting launch hydrography.
Credit
NOAA Office of Coast Survey
Category
Historic Coast & Geodetic Survey
Nautical Charting
Navigation
3-Point Sextant Fix
Keywords
Charting
Visual Signals
Visual Signals
Sextant