||KRI Viper (820)
||20 October 2006
||in active service, as of 2012
|General characteristics 
|Class and type:
||Type PC-40 patrol boat
||40 m (131 ft 3 in)
||7.3 m (23 ft 11 in)
||29 knots (54 km/h; 33 mph)
- 25 mm (1 in) machine guns
- 12.7 mm (0.50 in) machine guns
KRI Viper is a Type PC-40 patrol boat of the Indonesian Navy. It was commissioned on 20 October 2006 by Indonesian National Armed Forces Commander Marshal Djoko Suyanto.
There are a total of 11 boats in the PC-40 class, KRI Viper, Piton, Weling, Matacora, Tedung Selar, Boiga, Krait, Tarihu, Alkura, Birang, and Mulga.
The vessel is equipped with Russian-made 25 mm and 12.7 mm calibre machine guns. It also has a combat information room, a communication room and an ammunition store room.
Viper helped recover some of the bodies from the ferry MV Levina 1.