sentences:  The first NSC, the "Bertholf", has had structural enhancements put into place to fix reports of fatigue life issues; the second NSC, "Waesche", had structural enhancement work completed in September 2018.The cutter "Stratton" and all subsequent NSCs have the enhancements already installed.The NSC program originally encountered problems meeting TEMPEST requirements, but after more recent testing the first NSC, the , passed all TEMPEST requirements.