not necessarily fixed emplacements. mobile SAMs have been a thing since vietnam war... (which is what contributed to numerous US aircraft casualties due to ambush spots)
pick your flavor:
Russian:
American:
and this is what it would look like if you overlay the effective ranges of an S-300PMU3(S-400) and S-300PMU2. The former(400km radius) is shown in green while the latter(250km radius) is shown in purple.
the red line being our territorial claim.
mobile SAMs are so cost effective that for the price of an F-18 you can buy a whole battalion of S-300PMU3 consisting of 8 launchers equipped with 4 missiles. that alone can shut down a chinese carrier worth of aircraft... (32 missiles vs. 24 J-15s)








Would have been faster if I just walked.


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