(2)
The sum of—
(A)
his active service as a member of the armed forces, a nurse, a reserve nurse, a contract surgeon, a contract dental surgeon, or an acting dental surgeon;
(B)
his active service as a member of the National Oceanic and Atmospheric Administration or the Public Health Service; and
(C)
his service while participating in exercises or performing duties under sections
502,
503,
504, and
505 of title
32.
For the purpose of paragraph (2), active service as a member of the National Oceanic and Atmospheric Administration includes active service as a member of the Environmental Science Services Administration and of the Coast and Geodetic Survey.