from the very first sound ( a cartoonish attempt at an active sonar ping ) by a synthesizer sampler and this movie be riddle with mistake and inconsistency . the opening ping could have be avoid by a simple phone call to pt loma and california to ask for an email attachment . mpg of an actual ping for the all important opening of this movie . who in their right mind would produce a movie without subject matter expert adviser . this entire movie be pitifully flaw . i could overlook budgetary constraint but to have the ship captain stand before his men and determine that a torpedo that have just explode nearby be launch from a new unknown class of submarine while that just too much . he deduce this without any sonar data and no intelligence and and no evidence that the attack wasn not carry out by an anti submarine aircraft or even an enemy frigate or destroyer . heck and he do not even know there be anything shadow him only a minute before . one the other hand and the national enquirer reader will eat it this twinkie up and the folk that vote base on the daily show or the colbert report will wonder why it wasn not nominate for an academy award . i do not understand why these hollywood marshmallow do not just ask a man to look over their script to cull the nonsense .