Priority one was a type of communiqué used within the Federation, including Starfleet, that noted messages of high priority. In 2269, Uhura sent a priority one call to Governor Robert Wesley of the planet Mantilles to warn him of the danger of an approaching cosmic cloud. (TAS: "One of Our Planets Is Missing") Prime Minister Nayrok sent the USS Enterprise-D a priority one message on a priority channel, after Roga Danar escaped from the ship and captured an Angosian police shuttle. (TNG: "The Hunted" )