1. In the past, the U.S. Navy specified the SPS-48G across its fleet, including on board CVN, LHA, and LPD vessels, leaving a large number of units in use 2. Older U.S. Navy CVN, LHA, LHD, and LPD class ships are being upgraded from SPS-48E to SPS-48G configuration as part of the ROAR program 3. The SPS-48G will be replaced by Raytheon's SPY-6 AMDR-based EASR on new-build ships.
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