5 ms·
Ah, good point. In that case expand the niche cases to traveling due north or south.
by throwawaylinux 3y ago
Ah, good point. In that case expand the niche cases to traveling due north or south.
- wkat4242 3y agoAnd, at sea level. At altitude this no longer applies either because the circumference at altitude is greater.
- closewith 3y agoWell, it still applies in aviation, as distance and ground speed used in navigation are measured at sea level irrespective of altitude.
- pbmonster 3y ago...by around 0.1%. Which is why nobody is bothering with it, considering how susceptible to wind speed distances and velocities are up there.
- jabl 3y agoIn practice, when navigating by pen and paper, what you do is you measure a distance on the chart with a divider, then you put the divider (with the previously measured distance set) to the north-south scale on the side of the chart to read out the distance in nautical miles. Now, of course, in principle charts could have a separate scale for distances in km, and we could use km for navigation just fine. But, well, I've never seen a nautical chart with such a scale.