NavList:

You should only need a star finder for the first evening twilight round of stars after leaving port. In fact, if the navigator isn't watching the evening news on TV at twilight the day before casting off but is out doing what he should be doing, looking up at the stars, then he shouldn't even need the star finder for the first night out. After that, the same stars will be visible every evening in approximately the same postions at evening twilight when moving at sailboat speeds. And, of course, no need for it at morning twilight since the navigator has all night to look up and identify the stars he will be shooting when the horizon comes up.

gl