The navigator would obtain a GMT time "hack" from the National Institute of Standards and Technology (NIST) radio station, WWV, at Fort Collins, Colorado. This time was then transferred to the rest of the crew during pre-flight planning at base ops. The navigator would simply say, "It will be [pick a time] in [x] seconds,” and the nav would count down to zero and the rest of the crew would set their watches to that time. The crewmembers would then transfer that time to the onboard chronometers during preflight checklists.