8 hours is a ridiculous length for something like sonar. Sonar, even if you are just steaming from one location to another, you are constantly working, thinking

8 hours is a ridiculous length for something like sonar. Sonar, even if you are just steaming from one location to another, you are constantly working, thinking, checking, updating. I'm not sure how it has changed since my time, but it was exhausting, and we had to do 8's a number of times when we were short operators. For me though 6's were worse. You lose your sense of which direction 'up' is in time.