I try to understand both approaches, Roger, and keep both running. Especially keeping traditional navigation
simple and reliable. So we used the air navigation
tables having averaged 3 or 5 sights. A master mariner showed me a useful way of getting 5 or 10 sights in a row: set the sextant
on a value that the (sun or star) was coming to, note it and write the hour; then note the time as the body touches the horizon.
Set the sextant
to the next reasonable value, note it, and get ready for the next time. Repeat as many times as necessary to get a reliable average. If this is difficult to visualize I can make a picture, somehow, and link it.
First world navigators watching for wave trains scattering off reefs
; clouds over lagoons — have an additional set of knowledge.