Actually, I cheated and used a table.... How about this conversion factor (that came up when I looked for the conversion table I used):
1 knots = 1.15077945 mph

That's a lot of significant figures!!! So, that would mean... 155.35522575

Seriously though, I think the 1.15 is plenty of sig figs... I can't imagine a conversion factor having 9!

Thanks for the correction. I always seem to get busted when I'm being lazy.... I guess that should tell me something!

Hey, it's Saturday. Laziness permitted~danielw