Once set up via the iOS/Android app, a pilot can record the different time-checks that pilot and aircraft logs require with a single touch of the button - as Kelly put it, the watch saves having ink all over your hand (pilots are required to record "block-off", take-off, landing and "block-on" times for every flight). wdf replica Secondarily, the ability to have several chrono and count-down functions quickly to hand and recordable is a real boon in navigation, whether your keeping up a private pilots licence or riding a Soyuz craft up to the ISS, where Kellys brother is station commander.