P-385-63 Range Safety Pamphlet Download

(3) Only those personnel actively engaged in firing and control of the missile as specified by appropriate TMs and FMs will be permitted in the SDZ at the time of missile firing. The number of personnel thus engaged should be held to an absolute minimum compatible with efficient operation. These personnel should, when possible, occupy appropri- ate protective shelters that have been located a minimum distance of 61 m from the launcher and constructed in accordance with approved USACE drawings. (4) Danger areas for debris from target drones which have normal flight paths should be contained within the impact area for the Improved Hawk missile. Areas of impact for target drones which have abnormal flights or which go out of control are not prescribed. b. Surface danger zone. (1) SDZ requirements for the Improved Hawk guided missile are given in table 12–1 and figure 12–6 that consists of an impact area and Areas A and B. This SDZ is constructed on the basis that the trajectory safety officer may accomplish actual destruction of the missile after 8.5 seconds from the time of firing or 5.5 seconds after leaving the trajectory corridor. The labels for the SDZ areas below are unique to the Improved Hawk guided missile. (2) Impact areas are considered adequate to contain the debris from missiles and the impact of missiles that have a normal flight. Trajectory corridor dimensions (W) include the maximum lateral displacement of the missile due to lead angles and maneuvers associated with intercepting a moving aerial target. The area extends 2,500 m to the rear of and to either side of the firing point and opens to a varying Distance (W) at 15,000 m downrange in the direction of fire to either side of the direction of fire depending on the altitude of the intercept (see table 12–1). This area is continued to a Distance (X) meters beyond the intercept point and to a Distance (Y) or (W), whichever is larger, to either side of the predicted intercept point (see table 12–1). The resulting area is considered adequate for firings to a point in space within the trajectory corridor. Range (Distance Y) will be the predicted point of ground impact or target intercept and may vary between minimum intercept and maximum ground impact range capability of the missile if the missile can be destroyed upon departure from the predetermined trajectory path by employing techniques which will reliably predict "range to go." Distance X must be equal to the maximum ground impact range capability of the missile only when trajectory corridors do not provide for destructive points to control the range as well as azimuth of the missile. (3) Area A is an area 4,200 m wide paralleling the lateral edge of the impact area. This area is normally adequate to contain the debris from missile intercepts, missiles destroyed in trajectory corridors, and the impact of missiles that have an abnormal flight or go out of control and must be destroyed by the trajectory safety officer. Range area to the rear of the firing point is adequate when early prediction of missile trajectory and destruction of the missile can be accomplished in the event the missile is heading in the direction opposite the planned trajectory. The 4,200 m width of Area A is based on the use of trajectory corridors. If trajectory corridors are not used, the width of Area A must be increased to 6500 m to provide time for the trajectory safety officer to recognize abnormal trajectory characteristics and destroy the missile. (4) Area B is an area 7,500 m wide and is an extension of the impact area and Area A in the direction of fire. (5) Area F is defined as the area within 61 m of the launcher that is endangered at the time of launch. Hazards are hot rocket exhaust and high velocity aggregate. (6) The Improved Hawk guided missile SDZ is constructed in the following manner: (a) Lay out the target flight path on a map or scaled drawing of the firing range. Mark the minimum and maximum intercept points on the target flight path. The two lines joining the intercept points with the launcher define the minimum and maximum firing azimuths. Alternatively the minimum and maximum firing azimuths define the appro- priate intercept points. (b) At a range of 15 km from the launcher, draw lines perpendicular to the firing azimuths. (c) Along the line perpendicular to the maximum firing azimuth in the direction of increasing azimuth, mark point (1) at 4,000 m (trajectory corridor width), point (2) at the Distance W (maximum debris distance from table 12–1 as determined by intercept altitude), and point (3) at the distance of W plus 4,200 m (the outer boundary of the lateral secondary danger area, Area A). (d) Similarly, along the line perpendicular to the minimum firing azimuth in the direction of decreasing azimuth, mark the points (4), (5), and (6) at 4,000 m, the Distance W, and the Distance W plus 4,200 m respectively. (e) Draw lines in the downrange direction from points (1), (2), and (3) parallel to the maximum firing azimuth and from points (4), (5), and (6) parallel to the minimum firing azimuth. (f) At the firing section draw lines perpendicular to the firing azimuths. Along the line perpendicular to the maximum firing azimuth in the direction of increasing azimuth, mark point (7) at a distance of 1,000 m. Connect point (7) with points (1) and (2) with straight lines. Along the line perpendicular to the minimum firing azimuth in the direction of decreasing azimuth, mark point (8) at a distance of 1,000 m. Connect point (8) with points (4) and (5) with straight lines. (g) Draw a semicircle with center at the firing section with a radius of 2,500 m to the rear of the firing section. (h) Draw straight lines tangent to the semicircle to points (3) and (6). 165 DA PAM 385–63 • 16 April 2014