Originally Posted by PaulinVictoria
Learn how to splice and do it properly, takes up less space than a knot and once you've done it a few times it's pretty straightforward, will only take you 10 minutes and you'll end up with a much better and nicer looking result.
A splice is far longer than a knot, every time.
Splices can jam in blocks (fatter than rope, bad if it happens at the masthead).
You can cut off a knot and refresh wear spots. Can't do that with a splice (can't splice old line).
You can untie the knot, remove twist from the line, and re-tie the line.
There are good places for splices--even more so for 3-strand which doesn't knot as well--but most splices are for looks and not function.
Docklines--a knot often is the way of the chocks or something similar.
Chain--to rope--a knot won't pass the windlass.
Bridles--Often 3-strad (more stretch) and like dock lines.
Amsteel or similar--doesn't knot for beans.
And I can't think of any others that truly matter.
As for sewing/seizing, any book on traditional marlinspike skill will cover it. Fully rigged (old) ships were full of seizings. Protection from sun and chafe can be a problem, but clearly the old timers thought is was sometimes--often--the best answer. Of course, doing it properly isn't really faster than splicing new line, but it often beats splicing old line.
Yes, I know how to splice, can do it quickly and even enjoy it. And I know when it's dumb.