My father used to help design and build sonar of varying types for the Australian Navy (RANRL) when I was a kid. I used to love hanging with them all and even g

My father used to help design and build sonar of varying types for the Australian Navy (RANRL) when I was a kid. I used to love hanging with them all and even got to go on a submarine a few times. He had to be fully qualified for sea trials. I assume a lot of his work was adapted from other countries, but he still will not really get into details about what he did for them (70s and 80s). One little nugget he told me a few years ago: their entire UI/UX team were psychologists, engineers played almost zero role in that aspect.