3 ms·

As a former Marine (07-12), yes, they do still teach basic land navigation using a map and compass. However, the skills are not reinforced or even practiced r

As a former Marine (07-12), yes, they do still teach basic land navigation using a map and compass. However, the skills are not reinforced or even practiced really. It is not as easy to conduct EW against GPS as you would think, at least not military specific capabilities. There are contingencies and capabilities in place for that. Bigger concern would be the GPS satellites being destroyed altogether. Which is also why when you hear news reports about China or the US destroying their own satellites using ship launched missiles, the message intended to be conveyed is more than meets the eye. Those demonstrations are really about telegraphing to adversaries what you can/would do in the event of a conflict.

LargoLasskhyfv 5y ago
Would that really matter, given the existence of [1] https://www.microsemi.com/product-directory/clocks-frequency-references/3824-chip-scale-atomic-clock-csac https://www.microsemi.com/product-directory/clocks-frequency... , [2] https://en.wikipedia.org/wiki/Ring_laser_gyroscope https://en.wikipedia.org/wiki/Ring_laser_gyroscope , [3] https://en.wikipedia.org/wiki/Fibre-optic_gyroscope https://en.wikipedia.org/wiki/Fibre-optic_gyroscope , and other [3] https://en.wikipedia.org/wiki/Microelectromechanical_systems https://en.wikipedia.org/wiki/Microelectromechanical_systems gizmos like [4] https://en.wikipedia.org/wiki/Vibrating_structure_gyroscope#MEMS_gyroscopes https://en.wikipedia.org/wiki/Vibrating_structure_gyroscope#... ? Especially when global [5] https://en.wikipedia.org/wiki/Digital_elevation_model https://en.wikipedia.org/wiki/Digital_elevation_model fit multiple times on the equivalent of some micro-sd card nowadays? Seems like something like this [6] https://en.wikipedia.org/wiki/Synthetic_vision_system https://en.wikipedia.org/wiki/Synthetic_vision_system wouldn't need to depend on GPS at all, maybe some sensor fusion for things like radar/infrared/whatever.
- bladegash 5y ago
  I’m not very familiar with the technologies you linked. However, bear in mind the military operates at a scale that’s hard to fathom. Fielding new capabilities requires substantial level of effort when it’s military wide. Aside from that, many times they already have some tricks up their sleeves if push ever came to shove.
  - LargoLasskhyfv 5y ago
    Me neither, except on a pop-science level. Anyways, what I linked to are the key components for inertial navigation systems. Not all of them together, but several options. The first is that chip-scale 'atomic clock' thing from microsemi, a very precise time source. Something like that would be needed in every case. The others are different possible paths to precisely measure (speed of) movement and (change of) orientation. Based on those you could construct inertial navigation 'on the go' in small form factors. Not smartphone-like small at the moment, but close to. Regarding the scale of fielding/roll-out, ask Apple, Honeywell, or someone like that... Thinking about it, maybe that is why 'the others' play at shooting things in orbit because they allready have 'Mao's mighty map' available? Who knows? Whatever. The end of GPS/GNSS wouldn't necessarily have to be 'the end of navigation'.

LargoLasskhyfv 5y ago

Would that really matter, given the existence of [1] https://www.microsemi.com/product-directory/clocks-frequency-references/3824-chip-scale-atomic-clock-csac https://www.microsemi.com/product-directory/clocks-frequency... , [2] https://en.wikipedia.org/wiki/Ring_laser_gyroscope https://en.wikipedia.org/wiki/Ring_laser_gyroscope , [3] https://en.wikipedia.org/wiki/Fibre-optic_gyroscope https://en.wikipedia.org/wiki/Fibre-optic_gyroscope , and other [3] https://en.wikipedia.org/wiki/Microelectromechanical_systems https://en.wikipedia.org/wiki/Microelectromechanical_systems gizmos like [4] https://en.wikipedia.org/wiki/Vibrating_structure_gyroscope#MEMS_gyroscopes https://en.wikipedia.org/wiki/Vibrating_structure_gyroscope#... ? Especially when global [5] https://en.wikipedia.org/wiki/Digital_elevation_model https://en.wikipedia.org/wiki/Digital_elevation_model fit multiple times on the equivalent of some micro-sd card nowadays? Seems like something like this [6] https://en.wikipedia.org/wiki/Synthetic_vision_system https://en.wikipedia.org/wiki/Synthetic_vision_system wouldn't need to depend on GPS at all, maybe some sensor fusion for things like radar/infrared/whatever.

bladegash 5y ago
I’m not very familiar with the technologies you linked. However, bear in mind the military operates at a scale that’s hard to fathom. Fielding new capabilities requires substantial level of effort when it’s military wide. Aside from that, many times they already have some tricks up their sleeves if push ever came to shove.
- LargoLasskhyfv 5y ago
  Me neither, except on a pop-science level. Anyways, what I linked to are the key components for inertial navigation systems. Not all of them together, but several options. The first is that chip-scale 'atomic clock' thing from microsemi, a very precise time source. Something like that would be needed in every case. The others are different possible paths to precisely measure (speed of) movement and (change of) orientation. Based on those you could construct inertial navigation 'on the go' in small form factors. Not smartphone-like small at the moment, but close to. Regarding the scale of fielding/roll-out, ask Apple, Honeywell, or someone like that... Thinking about it, maybe that is why 'the others' play at shooting things in orbit because they allready have 'Mao's mighty map' available? Who knows? Whatever. The end of GPS/GNSS wouldn't necessarily have to be 'the end of navigation'.