Neil Armstrong was a Human astronaut with NASA, the predecessor to the IASA, famous for walking on the moon and uttering the line, "One small step for man, one giant leap for mankind."
When John Crichton was discussing the pending Farscape-1 launch, DK said "One small step bud," in order to indicate to John that his father had entered the room behind him. ("Premiere")
Crichton used the line in the Uncharted Territories after stepping on the miniaturized Axikor. ("I Shrink, Therefore I Am")