I've never been on a sub, but I would think that life could get a little dull at times. Any chance to play hide and seek with another sub, friendly or not, would be a perfect chance to use the skills you've trained for and break up the monotony.Then there is Rule 5: You must maintain a competent lookout at all times.
I would say that both subs were operating in the blind and thus violating rule 5.
But then again with friendly nations you would think, have an agreement on where the playgrounds should be for each other's Navy. And not have these kinds of accidents.
I'm sure they do. When on the surface they need to follow the same rules as everyone else. They probably test them before leaving dry dock, and test them again next time they're in dry dock.Does a sub even have nav lights for when it's running on the surface? Until nukes, most diesel-electrics would run on the surface for charging and speed surfaces, according to a book I read on the history of submarining. The snorkel was a later innovation.
I don't know what today's diesel-electrics (still the majority of military subs, I believe) do to get around this.
Naa, we used them on the maneuvering watch coming in and out of port from the dive point. At Pearl Harbor that's about an hour, in Hong Kong it is closer to 12.They probably test them before leaving dry dock, and test them again next time they're in dry dock.