Choppy seas in the Atlantic could still cause a delay, but Blue Origin remains on the clock for an overnight launch of its New Glenn rocket on the Space Coast. The 321-foot-tall rocket making its debut on the NG-1 mission is targeting a three-hour window from 1-4 a.

Blue Origin is counting down to the launch of its New Glenn rocket on an orbital mission that's been more than a decade in the making.

Blue Origin is planning to launch its reusable heavy-lift New Glenn rocket for its inaugural voyage at 1 a.m. EST Sunday if weather conditions allow it to proceed.