Why do all Northern European submarines have sonar systems?... boats countries judge machines seeing Please Rate Vote 1 Vote 2 Vote 3 Vote 4 Vote 5 Today's featured daily humor:Why do all Northern European submarines have sonar systems? They Scandinavia.Click for another laugh! Previous article: What do you call the clear day after the a rainy day?... Prev Next article: What did the pig say when it was left in the sun too long?... Next