Complex sentence: The members of the 129th have performed rescues under a variety of conditions-from rough Pacific seas to the rugged Sierra Nevada, using its combination of MC-130 tankers and HH-60 helicopters.
Split into simpler sentences: The members of the 129th have performed rescues under a variety of conditions-from rough Pacific seas to the rugged Sierra Nevada. The using its combination of HC-130 tankers and HH-60 helicopters.