Later in the course of the war other operational units were created.

The previous plan was to have an operational unit ready by 2017.

The wing did not become an operational unit until 1961.

The quicker they got an operational unit running, the better.

Trained with B-17's and also served as an operational training unit.

A total of 17 Class 103 have been preserved, with at least five units still operational.

It took more than 10 years from the first pilot in 1940 to a fully operational unit.

The first fully operational unit will be assembled in 1935.

On completion of the tour, members return to operational units.

We anticipate having this unit fully operational in the very near future.