P-385-63 Range Safety Pamphlet Download

Table 10–8 Sub-missile drift factors for improved conventional munitions Wind velocity (knots) Elevation (mils) Maximum range drift (m) Maximum deflection (m) 50 300 250 250 50 600 150 160 50 1,150 100 100 10 300 50 50 10 600 40 30 10 1,150 20 20 10–12. Multiple Launch Rocket System and High Mobility Artillery Rocket System a. Firing conditions. (1) All non-mission-essential personnel will be cleared from the SDZ. (2) Meteorological data in use at the fire control system will not be more than 4 hours old. (3) The weapon system navigation unit must be verified as correct. Ensure that the launcher is properly calibrated (M270 only), updated with a verified survey control point (if not using global positioning system navigation, and that startup data is correct. (4) Fire control system internal tests must be successfully completed. (5) Firings will not be conducted if: (a) There is any question of proper operation of the launcher. (b) The winds have changed dramatically since meteorological data was taken. (c) Any other sign of abnormal operation is evident. (6) Safe separation distance between Multiple Launch Rocket System (MLRS) and High Mobility Artillery Rocket System (HIMARS) launchers firing simultaneously is 55 m. b. Surface danger zone. (1) MLRS/HIMARS safety computations are contained in ATP 3–09.60 and MCRP 3–1.6.24. Values for Distance W and Distance X in ATP 3–09.60 and MCRP 3–1.6.24 have danger Areas A and B included in their values. (2) MLRS/HIMARS SDZ requirements for practice and tactical (for combat only with M77 grenade payload) warheads are provided in table 10–9 and figures 10–8, 10–9, 10–10, 10–11, 10–12, and 10–13. Dimensions of the SDZ vary according to range to target and launcher height above MSL. The SDZ consists of an impact area, Areas A, B, and F and exclusion Areas I, II, and III forming a rectangle around the target with a corresponding flight corridor back toward the launcher. (3) The rectangular impact area extends X meters beyond the target, Distance W to the left and right of the target, and 2,200 m from the target toward the launcher (Distance Y). The construction of the SDZ is completed by connecting the near left and right corners of the rectangle to respective points 350 m to the left and right of the launcher. The impact area is designed to contain fragments and debris (payload, warhead skin, and rocket motor) from normal functioning rockets. Distance X is adequate to contain rockets when the fuze fails to function. (4) Area A is 320 m. (5) Area B is 1,300 m. (6) Exclusion Area I is the 4,700 m area that extends forward of the launcher. It is endangered by premature fuze function or failure of the rocket motor during boost phase. Exclusion Area I may be reduced to not less than 1,000 m by deviation. (7) Exclusion Area III is an area 1,800 m on the up-range side of the impact area and parallel to Area B. This area is designed to contain fragments and debris from early functioning warheads at the near edge of the impact area. (8) Exclusion Area II is the remaining area located between Exclusion Areas I and III once these areas are constructed. Occupation of Exclusion Area II by unprotected personnel is authorized only under an approved deviation. Length of Exclusion Area II varies with range to target. (9) Area F is the area immediately to the rear of the launcher directly exposed to blast overpressure, fragments, and debris from rocket launch. Area F consists of two parts, the launcher danger area (LDA) and the noise hazard area (NHA). The LDA extends 350 m to each side of the launcher and 400 m to the rear. Personnel are not authorized to occupy the LDA during firing. The NHA extends an additional 300 m to 500 m past the LDA and may only be occupied by participating personnel wearing approved hearing protection. (10) Fin release failure impact area is required only for tactical rockets. This area is a sector with an origin at the launcher with a radius of 12,500 m. It includes a total angular measurement of 114 degrees centered about the azimuth of fire. 124 DA PAM 385–63 • 16 April 2014