TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9--2350--311--10 Change 6 e WARNING High intensity hearing protection required. Failure to wear hearing protection could result in hearing impairment. It is imperative that the following table be followed to ensure personnel do not accumulate more than 1000 points in a 24 hour period. NOTE • If hatches are closed, use blast overpressure and lead parameter and if hatches are open, use only blast overpressure parameter. • Do not combine the total points of the two parameters. Each parameter has its own 1000 point limit. BLAST OVERPRESSURE/LEAD HAZARD POINT RATING SYSTEM IF THE DRIVER IS NOT IN THE DRIVERS COMPARTMENT (1000 POINT LIMIT) PARAMETER CONDITION PROPELLING CHARGES M3/M4 M119 M203 M231 Chg1 M231 Chg2 M232/ M232A1 Chg3 M232/ M232A1 Chg4 M232/ M232A1 Chg5 LEAD HATCH CLOSED 2.3 12 22.2 NA NA NA NA NA SINGLE REAR & SIDE OPEN 6 37 P 1 1 71 P P HEARING REAR ONLY OPEN 6 37 P 1 1 71 83 P PROTECTION HATCHES CLOSED 6 37 6 1 1 1 8 8 P=Prohibited Note: Since the blast overpressure exceeds 1000 when firing the family of M203 and M232/M232A1 charges with the hatches open, firing the M203 and M232/M232A1 charges with hatches open is prohibited. Example: To figure 1000 point limit of lead parameter 25 M3/M4 Charges 25 x 2.3 = 58 points 25 M119 Charges 25 x 12 = 300 points 25 M203 Charges 25 x 22.2 = 555 points 913 points Example: To figure 1000 point limit of blast overpressure parameter 25 M3/M4 Charges 25 x 6 = 150 points 22 M119 Charges 22 x 37 = 814 points 964 points