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Haijiu Class (Type 037-I) Anti-Submarine Patrol Craft

The Haijiu anti-submarine patrol craft is a lengthened version of the Hainan Class patrol craft with upgraded armament and some sensors. Only four units were built, indicating it was unsuccessful. The first unit was completed in 1987. A fourth sister, Pendant Number 694, was stricken in 1995, followed by Pendant Number 688 in 1997. The remaining two units (693 and 697) were active in the East Sea Fleet. As of 2008 both boats remained listed in active service.

The raked bow has considerable sheer and flare, but the rest of the flush-deck hull has a rather low freeboard. In place of the Hainan's blocky, separated deckhouses, the Haijui featuers a smoother, continuous superstructure amidships. The Round Ball fire control radar is prominent on the bridge roof ahead of the tripod mast. A Thomson-Sintra SS 12 variable-depth sonar is fitted to hull 688 and 697 in place of the aft twin 57-mm mount.




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