If you have permission from another player to follow their TARDIS you can construct the Time Path Detector(Model in the TARDIS Type 40 Instruction Manuel). Inserting the time path detector into console will allow you to see TARDISes you have permission to follow in the vortex. Clicking on the username of the owner will enable the TARDIS flight and will lock on to the desired TARDIS until it has landed at its destination. YOUR TARDIS will then materialise 5 - 10 blocks away from the other TARDIS. During the flight, you will experience slight turbulence as your TARDIS struggles to keep the lock on the other TARDIS.