3 ms·
How accurate are depth gauges? (I see them in submarine movies all the time, but I don’t really know anything about them.). But if your depth gauge says 100 ft
by abruzzi 4y ago
How accurate are depth gauges? (I see them in submarine movies all the time, but I don’t really know anything about them.). But if your depth gauge says 100 ft, and the sonar says the ice is 80 ft above you, then you should be able to estimate 20 ft. Also does the presence of ice affect the depth gauge? I’d think not, but I don’t know.
- mcdonje 4y agoYou could be onto something there, but it'd be complicated by displacement. If it pushes the water boundary down 20', how thick is the ice above sea level? If they have a pretty consistent way to estimate that at the relevant level of granularity, then that would work.
- LarryMullins 4y agoIf the density of both the ice and the water are known and if the ice is floating (not resting on the bottom), then you can calculate how much ice is below the water by observing how much ice is above the water, and vice versa.
- Retric 4y agoIce has a reasonably uniform density as does sea water. This approach isn’t going to provide micron level precision, but should get to within inches.