Not knowing my OWN position?

[epaga]

Originally Posted by anthrax

Actually, It was pretty reasonlble to be able to know the location of your submarine accurately.
Fleet type submarines had a underwater log system that could accuratly track the movement of the submarine even when it was submerged. This system was accurate enough for fire control purposes. The data from it was then fed into the TDC so that the "position keeper" could keep constantly create an accurate firing solution on a target.

Was this system used for navigation as well, not only for moderately short-term firing solutions? Also, I always thought the PK didn't take into account any of my own movements...guess I was wrong, wow, that makes it an even niftier invention then I thought.