In 1967 the Lunar Orbiter 4 photographed this region in high resolution, discovering a 310-km-long gouge cutting through the middle of Sikorsky.

This is a heavily eroded crater formation with a rim that has been worn and rounded by a long history of lesser impacts.

In addition to the wide valley mentioned above, there is a lesser cleft that cuts into the eastern rim from the south-southeast.

At nearly the exact midpoint of the floor, and intruding into the western side of the Vallis Schrödinger, is the almost perfectly bowl-shaped satellite crater Sikorsky Q.

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Sikorsky.