Gsus4@mander.xyz to Technology@lemmy.worldEnglish · 15 days agoWorld's first GPS-free quantum navigation trial succeeds at seainterestingengineering.comexternal-linkmessage-square30linkfedilinkarrow-up118arrow-down10
arrow-up118arrow-down1external-linkWorld's first GPS-free quantum navigation trial succeeds at seainterestingengineering.comGsus4@mander.xyz to Technology@lemmy.worldEnglish · 15 days agomessage-square30linkfedilink
minus-squarefrongt@lemmy.ziplinkfedilinkEnglisharrow-up0arrow-down1·14 days agoThe realer play is submarines. You don’t get any satellite signal at all underwater. Before this it was only INS or dead reckoning.
minus-squareCookieOfFortune@lemmy.worldlinkfedilinkEnglisharrow-up0·14 days agoI suspect submarines can also use bottom facing radar to track features on the sea floor. But tracking the gravity should be even better.
minus-squarefrongt@lemmy.ziplinkfedilinkEnglisharrow-up0·14 days agoRadar is radio, just like most satellites. It doesn’t do well through water. And that would require emissions, which submarines like to avoid.
The realer play is submarines. You don’t get any satellite signal at all underwater. Before this it was only INS or dead reckoning.
I suspect submarines can also use bottom facing radar to track features on the sea floor. But tracking the gravity should be even better.
Radar is radio, just like most satellites. It doesn’t do well through water. And that would require emissions, which submarines like to avoid.