put on the mask by yourself. If at all possible, try to hold your breath until the mask is on; this may be very difficult since blood agents strongly stimulate respiration. If a person’s breathing has stopped, administer artificial ventilation. EFFECTS OF VOMITING AGENTS. — Vomiting agents are used for harassment but may be dispersed along with lethal chemical agents. Vomiting agents alone cause temporary incapacita- tion only. Vomiting effects last from about 30 minutes up to several hours, depending on the concentration. Vomiting agents are invisible and odorless. They attack the body through the nose and mouth and irritate the eyes. EFFECTS OF TEAR AGENTS. —Tear agents are used for their harassing effect. They have been used extensively as riot control and chemical defense training agents. Tear agents attack the eyes and irritate or burn moist areas of the skin. Effects are instantaneous but normally persist for only a few minutes. Table 7-9 shows the properties of blister, blood, nerve, and choking chemical agents. PERSONNEL DECONTAMINATION STATIONS Personnel decontamination stations differ somewhat from ship to ship, but the basic requirements of the stations are the same. Each decontamination station is divided into two parts: (1) a contaminated or unclean section containing a washing area and (2) a clean section. This prevents recontamination of personnel and ship locations. If possible, the unclean and clean sections have separate access routes or entrances. The decontamination station provides showers with warm water (if possible); cleansing agents, such as ear syringes and eye bath cups; hair and nail clippers; scissors; surgeon’s hand soap; towels; and brushes. Radiation instruments for monitoring personnel and clothing and supplies of clean clothing are also on hand at each station. A decontamination (decon) station should be about 8 feet by 9 feet. It should have an entrance from the outside and an exit into an uncontaminated area near the showers. If exposed to contamination, you should use proper decontamination procedures. Do not remove your mask until a monitor tells you it is safe to do so. In general, personnel decontamination does not take priority over urgent battle requirements, but it should be accomplished as soon as possible. The following is a list of decontamination procedures: 1. Remove rain gear and battle dress just out- side the decon station. Place it in the trash cans, bags, or other storage provided. Now you will be monitored for contamination. If there is no contamination, go to an uncontaminated space through another route. If there is contamination, go through the process described in paragraph 2 through 5 below. 2. Enter the first part of the decon station in pairs. Use the buddy system to do gross decon of masks and gloves with the M258A1 personnel decon kits. Decon boots by immersing them in the 2- by 2- by 6-inch pans filled with a 9 percent high test hypochlorite (HTH) and water solution. 3. Move to the second part of the decon station where attendants will cut away your smock and help remove your trousers and boots. Place the contaminated clothing in trash bags for disposal. 4. Move to the showers, soap and wash your entire body thoroughly, and rinse well. Pay special attention to fingernails, hairy parts of the body, and hidden parts where contamination tends to concentrate. 5. You are now ready to enter the clean part of the ship where you will put on new clothing. Before you enter the clean part, a monitor with a long-range radiac will check to ensure that you no longer carry contamination. Turn over your DT-60 dosimeter to this monitor. The monitor will take the readings and enter them in the log.You will be told if you can remove your gas mask. MISSION-ORIENTED PROTECTIVE  POSTURE Mission-oriented protective posture (MOPP) establishes levels of readiness. The MOPP is a flexible system of protection against chemical agents used in chemical warfare defense. MOPP prescribes various types of protective clothing and equipment for wear, depending on the tactical mission,   work-rate demand, and heat stress conditions (actual or possible). There are four 7-28