A formation of up to nine C-17 cargo planes will take off Thursday from Joint Base Charleston bound for a series of training missions, the base announced.

If all goes to plan, the route will go over the Arthur Ravenel Jr. Bridge, between 9:35 and 9:55 a.m.

The planes will depart on a mission that will include airdrops, aerial refueling and low-level tactical training. "This exercise is not in response to real-world events," the base said.

Takeoff from Charleston Air Force Base is around 9:30 a.m.

Taking part in the exercise are active-duty members from the 437th Airlift Wing and reservists from the 315th Airlift Wing. A similar exercise was held last year.

The takeoff has been coordinated with the Charleston County Aviation Authority. It will not delay regularly scheduled flights at Charleston International Airport.

The training requirements are to focus on maintaining mission readiness, the base said.

Reach Schuyler Kropf at 937-5551.