Possible Clues:

• Positional sense requiring lubrication?
• Small balls in position one doesn't want to lose
• They might be a circle's turning
• Could you stand having gins mixed like this, even if they make things go smoothly?
• (One's) orientation
• The engineer officer's responsibility taken by the navigator
• Directions in heraldry
• Direction relative to N.
• (Sense of) one's position or direction
• You'll be lost without these