>>476
こんなとこかな
ttp://www.navweaps.com/Weapons/WNUS_5-54_mk45.php

最大射程　47 degrees　25,290 yards (23,130 m)
有効射程　Effective Range　16,400 yards (15,000 m)
対空射高　AA Range @ 65 degrees　23,000 feet (7,000 m)
Illumination　18,085 yards (16,540 m)

Illuminationは照明弾ですかね？