Not sure about that. ESGN is old technology, since submarines don't need that much accuracy. For example, space probes, ballistic missiles, smart artillery shel

Not sure about that. ESGN is old technology, since submarines don't need that much accuracy. For example, space probes, ballistic missiles, smart artillery shells/rockets/missiles and so on would all appear to have multiple orders of magnitude better accuracy than submarines, in the fractional ppb ranges, rather than tens of ppm. [0][1] 0. https://www.sto.nato.int/publications/STO%20Meeting%20Proceedings/RTO-MP-SET-104/$MP-SET-104-KN2.pdf https://www.sto.nato.int/publications/STO%20Meeting%20Procee... 1. http://users.cecs.anu.edu.au/~Jonghyuk.Kim/teaching/Inertial_Where%20to%20now_DraperLab.pdf http://users.cecs.anu.edu.au/~Jonghyuk.Kim/teaching/Inertial...