sea duty
(3) For the purpose of determining the years of sea duty with which a member may be credited for purposes of this section, the term “sea duty” also includes duty performed after December 31, 1988 , by a member while permanently or temporarily assigned to a ship or ship-based staff and while serving on a ship on which the member would be entitled, during a period that the ship is away from its homeport, to receive sea pay by reason of paragraph (1)(B).