"Unit" could mean a couple different things, but as I'm unaware of any measurement bearing the intials USAR, I'm going to assume that you're referring to an organised unit in a military or paramilitary force, in which case, "USAR" could mean one of two things:
"Usar" is translated to "to use" in English.
Agitar antes de usar was created in 1988.
"Usar"
USAR stands for Urban Search and Rescue. USAR soil refers to soil conditions that are relevant to search and rescue operations in urban environments, where specialized techniques and equipment may be needed to locate and extract individuals from collapsed buildings or other structures. Understanding USAR soil properties can help rescuers anticipate challenges and plan their operations effectively.
To use
Volver a usar.
Usar is the infinivite of the verb 'to use.' It is unconjugated so in order to use it in most contexts, it needs to be changed for the correct tense and person.
usar (oo-sar)
use=usar or utilizar
The cast of Usar y tirar - 2003 includes: Maite Blasco Ivan Krastev Pepo Oliva
The cast of Agite Antes de Usar - 1985 includes: Anita Calabrez Andrev Soler
Translation: usando OR por usar