3 ms·
I don’t believe all of those are strictly necessary. Charts, sextant, and regular visual observations are all strictly necessary. Some kind of semaphore would
by TheSpiceIsLife 7y ago
I don’t believe all of those are strictly necessary.
Charts, sextant, and regular visual observations are all strictly necessary.
Some kind of semaphore would probably be handy too.
- dsfyu404ed 7y agoAll you "need" are the stars and some way to track time (a basic implementation conveniently provided by the sun). Everything else just increases accuracy. ;)
- dreamcompiler 7y ago> (a basic implementation conveniently provided by the sun). No. You need an actual clock and charts. The sun and stars are completely useless for determining longitude without a clock. The Moon on the other hand is marginally useful because its phases can be looked up. But its resolution is poor.
- DuskStar 7y ago> The sun and stars are completely useless for determining longitude without a clock. This is not completely true. The stars (and planets) provide for a very nice clock when viewed with sufficient resolution.
- m463 7y agoThere was an interesting youtube video a while back on the SR-71 that could navigate via the stars years and years ago. Of course the SR-71 probably never had cloud cover problems. :) edit: I think this one: https://www.youtube.com/watch?v=tj9UwKQKE3A https://www.youtube.com/watch?v=tj9UwKQKE3A
- dreamcompiler 7y agoThe SR-71 also had an excellent clock on board.
- nradov 7y agoThe COLREGs (as well as local supplemental rules) are rather complex. All of the additional items I listed are implicitly required at least for certain vessels in certain conditions.