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![Teacher at Sea on board the NOAA Ship OREGON II fis00253.jpg Teacher at Sea on board the NOAA Ship OREGON II](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_fis00253.jpg?itok=FC475nkG)
Description
Teacher at Sea on board the NOAA Ship OREGON II. Teacher at Sea BruceTaterka monitoring CTD operations. Although CTD stands for Conductivity/Temperature/Depth, the rosette also contains an oxygen sensor and sometimes achlorophyll sensor. The green line indicates dissolved oxygen which on thisobservation drops off near the bottom indicating hypoxia. (Image credit: NOAA Teacher at Sea Program | Bruce Taterka)