Most of my time underway was ELT, Engineroom Forward, or ERS. (ERF had the secondary sample sink , and the ERS was free to go to it if there was no ELT there) The way that worked out was that I did almost no secondary chem when ELT, and all of it when not.
At one point, ELT's followed by M-Div. were the first Silver Dolphin divisions on board. We could sign about a third of the SS qual card, which meant we never had to wait long for someone to bring us coffee on watch. It also made the ELT duty about as lazy ass as it gets.
Here is my schedule as underway ELT after I got my quals:
1700 Wake up, shower eat dinner.
1800 Do routine rad surveys or pm's
2000 Watch movie
2200 Close out day's logs, finish any surveys already started, start new logs for next day, goof off or work on other quals ( I was the only MM on my boat to qualify as throttleman.)
2300 Eat midrats
0000 Start background check on one scaler, sign out of old day's log.do daily turbidity and conductivity analyses, buffer check sec. pH meter
0020 Switch to other scaler, start background check, buffer pri. pH meter, do daily contam survey of valve op areas.
0030 do source check on scaler, set up lab for primary sample, source check all friskers, count smears from daily survey
0100 watch SS movie.
0300 start primary sample
0400 clean up nuc lab, graph everything for the day, get graphs reviewed, do pm's on that day's schedule
0500 eat breakfast, put wake up call in COW's book.
0600 Read a book until I fall asleep
SLEEPZZZZZZZZZZZZZZZZZZ until 1700 or until that $%#%^#$% AEF wakes up section one - whichever comes first.
I never had to qualify EWS. By the time I was ready to, I got transferred to another boat and the same thing happened again. Then I got out and joined the human race.