The user should order a FAST Survey license for ProMark3 RTK and provide the receiver serial number to your Magellan Dealer. Then Magellan will deliver an activation code (a product key) that is only valid for this specific unit (it will fail in any other unit). The product key has to be entered in the Unlock FAST Survey utility program. Once FAST Survey is unlocked, the FAST survey icon appears on the desktop. Contact your local dealer for more info.