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Two things: couldn't the sonar pings be detected if you're close enough? And does anyone actually have a detailed enough map of the sea floor to do navigation b
by xxpor 5y ago
Two things: couldn't the sonar pings be detected if you're close enough? And does anyone actually have a detailed enough map of the sea floor to do navigation based on it?
- Arrath 5y agoThose that do have such detailed maps, if they do, probably aren't likely to talk about them.
- tablespoon 5y ago> Those that do have such detailed maps, if they do, probably aren't likely to talk about them. Though I think it's a reasonable inference that the US is probably didn't have them in 2005 for the whole ocean: https://en.wikipedia.org/wiki/USS_San_Francisco_(SSN-711)#Collision_with_seamount https://en.wikipedia.org/wiki/USS_San_Francisco_(SSN-711)#Co... > The seamount that San Francisco struck did not appear on the chart in use at the time of the accident, but other charts available for use indicated an area of "discolored water", an indication of the probable presence of a seamount. The Navy determined that information regarding the seamount should have been transferred to the charts in use—particularly given the relatively uncharted nature of the ocean area that was being transited—and that the failure to do so represented a breach of proper procedures. > Nonetheless, a subsequent study by UMass Amherst indicated that the Navy's charts did not contain the latest data relevant to the crash site because the geographical area was not a priority for the Defense Mapping Agency.
- KennyBlanken 5y agoNobody said the USN had them for the whole ocean. The point is that the Navy likely has numerous methods of providing external references to a submarine's INS. Map != position, by the way...
- monocasa 5y agoPassive sonar doesn't use pings.