destroyer draft

Has anyone else come across any surface ships that appear to be sitting way to high in the water? I just encountered a destroyer that seemed to be virtually floating across the surface of the sea! I fired off three fish at her with ever decreasing depths (the last being about 3ft) and they all went under her without exploding. When I used the free camera to check her out half of her props were out of the water and she was gliding along in what seemed to be a gravity defying way