Quote
Vince
Dad spent most of his time building gizmos with microphones. Yep, listening devices. Remember that Russian sub that imploded a few years back? Dad said "we knew within minutes where it was and what it was doing." He also said "Iran has submarines off our coast and we're having trouble finding them." This from a guy who doesn't say much.
I served in a Navy P-3 antisubmarine patrol squadron in the early '70's. I'm very familiar with former submarine activity but admit I'm not up to speed on present day deployments. Many third world nations have bought old diesel subs, many of which are former Russian "whiskey" class (NATO designation). If in fact Iran has any subs off our coast (likely only one at a time) they would be a diesel boat with snorkel capability which allows use of diesel engines while submerged shallow. Whether surfaced or submerged these diesels are easily detectable with acoustical sensors because they are just plain noisey. The only time they become difficult to detect is when they shut down the diesels and run slow and quiet on batteries. In this mode the motors are almost silent and the low speed props don't cavitate (create bubbles), making them the most difficult subs to locate. Fortunately, this mode is limited to the life of the batteries which must be recharged with the diesel engines. I don't believe Iran owns any nuclear subs. If they do they are not that difficult to track. There is one item on every nuclear boat (unrelated to engines or propellors) that is very difficult to keep quiet and is often the first sound detected.
I realize this post is quite a stretch from the Tioga Cam thread but if you look real close in some of the photos you can see a periscope in Tioga Lake. The Iranians are here!
Edited 3 time(s). Last edit at 06/09/2009 11:36AM by tomdisco.