This EMRG railgun did NOT require line of sight. Some of its projectiles even had mid-flight course correction: “The HVP is particularly well suited to expand the capabilities of the current
defensive structure. The HVP is capable of supersonic speeds and mid-air course correction
to intercept incoming ballistic missiles as well as engaging other targets as an offensive
weapon. The HVP is being developed to be fired from the future rail gun system as well as
the current Navy five-inch gun systems. For the purpose of this study, the HVP is evaluated
as used with the five-inch gun.”
https://apps.dtic.mil/sti/trecms/pdf/AD1126536.pdf
defensive structure. The HVP is capable of supersonic speeds and mid-air course correction
to intercept incoming ballistic missiles as well as engaging other targets as an offensive
weapon. The HVP is being developed to be fired from the future rail gun system as well as
the current Navy five-inch gun systems. For the purpose of this study, the HVP is evaluated
as used with the five-inch gun.”
https://apps.dtic.mil/sti/trecms/pdf/AD1126536.pdf