(A) was employed in the activation or operation of a vessel
(i) in the National Defense Reserve Fleet maintained under section
1744 of Title
50, Appendix, in a period in which that vessel was in use or being activated for use under subsection (b) of that section;
(ii) that is requisitioned or purchased under section
1242 of this Appendix; or
(iii) that is owned, chartered, or controlled by the United States and used by the United States for a war, armed conflict, national emergency, or maritime mobilization need (including for training purposes or testing for readiness and suitability for mission performance); and