SUBSIM: The Web's #1 resource for all submarine & naval simulations since 1997 |
06-28-19, 12:21 PM | #11 | |
Grey Wolf
|
Quote:
An INS drift after some time even the laser one, what is good for an airliner flying for few hours is not for a sub navigating under the sea for months. they need to re-calibrate their position. there is few methods - GPS but need to have a signal (and during a war, well don't count on it) - Old sextant method, need time and like the GPS method need to be on periscope depth - too dangerous during a war/crisis - Using a distinctive seafloor topography (a big rock in the middle of a flat) or a shipwreck whose exact location is well known. This is the magic point. And to find it, there is few systems like a XXXXX or a XXXXX - sorry this is classified And since nobody talk about, the title of the movie Wolf call refer to the sound of an active low frequency sonar using modulation to bypass the target distance ambiguity. This sound is like a wolf howling. |
|
|
|