[CrazyIvan]

This is worldwide discussion. Please use English language.
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SM-1MR , generic name of missiles.
In fact, this category includes missile RIM-66A, RIM-66B, RIM-66E.
These missiles have a different speed and different warheads.

For simplicity, the player designated as the missile SM-1MR (Medium Range), without a specific designation of the type of missile (RIM-XXx).
Since the ships being upgraded, and had over the years, have various models of missiles onboard.