Re: Redshirt Chekov
I get that it's a cheap cop out, rather than pay an extra to say lines give it to one of the "main" characters, but still seems very impractical, as it then leaves the ship without its whizkid Navigator, so an extra has to be drafted in to cover that post.
If I have to use a person that I personally trust to do either job, I'm going to put that person in Engineering. It's really that simple.
"...the most elementary and valuable statement in science, the beginning of wisdom, is I do not know." - Lt. Commander Data, "Where Silence Has Lease"