
Sigma class corvettes are built to sizes ranging from 50 to 150m in length and 9 to 15m width, addressing the whole spectrum from Offshore Patrol Vessel (OPV), via corvette to frigate size vessels meeting a wide range of customer demands.
In fact, the class name Sigma stands for Ship Integrated Geometrical Modularity Approach. The lead ship of the SIGMA class was KRI Diponegoro, launched in 2004 for the Indonesian Navy.
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