A result is that pilots already have a hard time flying enough to maintain proficiency.

You don't do a lot of formation landings on an aircraft carrier, and maintaining proficiency is tough.

Also, pilots fly low-level missions so seldom that they cannot maintain proficiency.

At Shaw, the Wing trained to maintain proficiency as a tactical fighter unit.

Some got so little use that the operators could not maintain proficiency in running them, investigators said.

Rangers are resourced to maintain exceptional proficiency, experience and readiness.

While excelling in sports, Schneider also maintained proficiency in academics.

Shell-people were encouraged to develop a hobby so long as they maintained proficiency in their technical work.

In order to maintain proficiency in a second language, it is essential that you continue to use the language on a regular basis.

Range practice, at least monthly, is often practiced by those who carry pocket pistols to maintain proficiency and accuracy.