Final answer:
There are a total of five MOPP levels, designed to protect military personnel from CBRN threats. These range from MOPP Ready to MOPP Level 4, where full protective gear is worn.
Step-by-step explanation:
The total number of Mission Oriented Protective Posture (MOPP) levels is five. MOPP is a system of protective gear and procedures designed to safeguard soldiers from chemical, biological, radiological, and nuclear (CBRN) contaminants. The levels are used to indicate the degree of protection required based on the threat level and are part of the defence protocols practised by military personnel.
The MOPP levels start from MOPP Ready, where protective gear is available but not worn, to MOPP Level 4, which is the highest level of protection, where all protective equipment is worn. The other levels, MOPP Levels 1 through 3, represent incremental stages of donning protective gear. It is important for military personnel to be familiar with these levels to respond effectively in the presence of CBRN threats.