ALL THAT GLITTERS IS NOT GOLD

Congratulations to Cadet Migliori who answered the previous challenge.  The correct answer is "marigold."  Clever fish.  Here's a new challenge:

For NS1s:  What was Commander Hankin's warfare specialty?  (Easy.)

For NS2, 3, and 4s:  Sid Jones was driving in his recently purchased sports car when he noticed that the odometer read precisely 12345.6 miles. What is truly amazing is that his trip odometer underneath read precisely 123.4 miles. What is the smallest distance that Jones can drive so that the two odometers have all ten digits between them, but share no digits in common?  (Hard--give up now.)

The NS1 challenge will close out 0730, Monday, 10 December.  The other will remain open until solved.  Be prepared to demonstrate your solution.