Note:
(a) 海龍 (commissioned 1987) and 海虎 (1988) are two of the four built Zwaardvis-class submarines (zwaardvis is Dutch noun for "swordfish" -- Dutch navy took the two earlier built boats).
(b) SUT = Surface and Underwater Target (in service 1967- . though production has ceased)
(c) Mark 48 torpedo https://en.wikipedia.org/wiki/Mark_48_torpedo
(its improved Advanced Capability (ADCAP) variant 9in service 1988- , compared with the original 1972- )