Smesta

Protection provided to a group of individuals in a nuclear, biological and chemical environment which permits relaxation of individual nuclear, biological and chemical protection.

The organized system of defensive measures instituted and maintained at all levels of command with the aim of achieving and maintaining security.

In an underwater environment, those actions taken to ensure effective friendly use of the acoustic spectrum by countering hostile acoustic warfare measures. Acoustic warfare counter-countermeasures involve antiacoustic warfare support measures and antiacoustic warfare countermeasures, and may not involve underwater acoustic emissions.

Those measures necessary to give protection to a person, plan, operation, formation or installation from the enemy intelligence effort and leakage of information.

Protection provided to the individual in a nuclear, biological and chemical environment by protective clothing and/or personal equipment.