it will remain in the same position and can be checked even now but if it is a moving object it must not be found with time at the same location. A recheck will remove the doubts. or if public want to enjoy mystry let them feel so and their guesses.
it could be a mini sub with twisting parts so as to imitate a croc ...this motion can quickly change direction of the sub and act as deterrent from torpedoes that cannot switch direction easily
it could be a mini sub with twisting parts so as to imitate a croc ...this motion can quickly change direction of the sub and act as deterrent from torpedoes that cannot switch direction easily