Clock time
Clock time is the wall-clock duration of a flight, captured as two timestamps: off blocks (brakes released, starting to taxi) and on blocks (parked, brakes on). The difference is the block time, and it includes taxi at both ends.
In Syndik8, clock time is one of two alternatives to engine-meter time. A syndicate’s time capture mode decides which of the two — or both — the usage log prompts for. The billing basis decides which one drives the hourly charge.
Clock time is the usual input for block and airborne billing bases. When the basis is airborne, taxi minutes are subtracted to produce airborne hours.