Love this movie, it turned me into an avid reader of Clancy.

At the time of this movie, I was working as a software engineer for a defense contractor building combat control systems for submarines. When it was released, the company took the entire department, including former Navy submarine officers now project/program managers to a private viewing. There were definitely groans when some things on the sub were inaccurate, but given the level of hands-on knowledge and expertise in the audience, it was very well received.