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![Commander Bill Hayes, commanding officer of ESSA Ship DAVIDSON, checkinghydrographic survey work cgs02717.jpg Commander Bill Hayes, commanding officer of ESSA Ship DAVIDSON, checkinghydrographic survey work](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02717.jpg?itok=7p1m1Fc1)
Description
Commander Bill Hayes, commanding officer of ESSA Ship DAVIDSON, checkinghydrographic survey work. Survey conducted by running arcs along constantdistance from navigation station. Intersection with second navigation stationdistance determines position of vessel along arc. (Image credit: Dan Twohig)
Photographer
Dan Twohig
Display Date
1968
Collection
Historic Coast & Geodetic Survey
NOAA Affiliation
NOAA (ret.)