The Hunt for Red October movie revealed classified information about U.S. submarines, because Tom Clancy knew his stuff.

Is it true that Tom Clancy was questioned by the FBI after he wrote “The Hunt for Red October?” - Quora

20 facts you might not know about 'The Hunt for Red October

What submarine was used in 'The Hunt for Red October'? - Quora

Was the movie 'The Hunt For Red October' based on a real event? Where is Murmansk, Russia where the sub was stationed? - Quora

Film Review – The Hunt for Red October (1990) – Let's Get Off This Rock Already!

The Hunt for Red October movie revealed classified information about U.S. submarines, because Tom Clancy knew his stuff.

Why read The Hunt for Red October?

The Hunt for Red October's Leak