Bring out the slide rules..it's getting deep

To give the pad team time to complete the regulator replacement and preserve plans for an on-time launch today, the countdown timeline is being juggled a bit. This current hold at T-minus 2 hours will be extended an additional 10 minutes prior to the start of fueling operations. Those 10 minutes will be take out of the planned T-minus 4 minute hold period, which was supposed to be 20 minutes long but now will be 10 minutes. All of that math means the countdown clocks can hit T-0 as scheduled at 4:09 p.m. EST.