Hi Ken,
I like plain edge knives best. The most common daily chores are opening mail, packages, cutting fruit (I like peaches), string or whatever. The plain edge is superior at all my usual chores. Come to think of it, the only event that the serrations were best was cutting (sawing) a pencil in two. That is far from a usual chore. The serrated blade is 100%, so the only plain edge is about 1/4" of the blade tip. Thats not much to slice envelopes, and serrations really screw up fruit.
I'd go with the plain edge for these reasons. Now, on airlines, I've carried the plain edge on several occasions within the states and have had no problems.
I've only read posts of others who have said airlines do not favor serrations.
It's never been an issue with me because if only ONE knife was going, it would be the plain edge anyway.
Airlines also have a blade length maximum. However, I don't know exactly what it is.
I would say plain = utility and serrated = exotic.
Also, I'm uncertain about the thickness of the G-10 scaled Navigator as it compares to the stainless sided Pegasis. The Navigator possibly is thicker.
The Pegasis is a bit more than 1/8" thick with the clip removed. It is really hard to tell its in your pocket in its sleek "non-clipit" format.
Let me know what you do.
Later, Bill
[This message has been edited by Bill McWilliams (edited 10-05-98).]