Exactly. We use our block time to get our pay. We use GPS time for green incentive. GPS time starts as you pass through 30 knots and ends as you slow down to 30 knots (ie on a fast turnoff, you can still see the GPS clock ticking). Consider this example:
Flight from FLL-EYW Scheduled to leave at 1200 and get in at 1300, blocked at 1 hour (out to in). You leave at 1200 (out) takeoff at 1210 (off) land at 1245 (on) and pull into the gate at 1250 (in). Because of the block-or-better, you still make 1 hour of pay, even though you blocked at 0:50. As for green incentive, you would make whatever the system says the flight time SHOULD take (lets say 45 minutes) minus what you actually flew (35 minutes). Your total payoff for that trip would be (hourly rate X 1 hour) + ($1.75 X 10 minutes saved). If, for some delay, you OVERblocked, you would make what you actually blocked, but no green incentive because the flight took longer than normal. In short, you get paid extra if you under fly, and block more if you over fly. Confusing as hell, i know...