A、Maximum Limiting speed Unsticks is the speed restrain which will not be intentionally surpassed in typical flight operations. V is communicated in knots and M in Mach Number. B、Maximum Restriction Speed is the fastest a plane can fly without breaking the rules in normal flight. The speed is measured in knots and Mach Number. C、Maximum Operating Limit Speed is the speed limit that may not be deliberately exceeded in normal flight operations. V is expressed in knots and M in Mach Number.