Indian Navy Chetak 440 copter crashes into sea off Vizag. Two rescued, search on for two other crew members. Navy Chetak chopper was on routine mission from INS Dega airfield in Visakhapatnam. Crashed into the sea at 3pm. Search & rescue effort on. Source:Shiv Aroor guys i can't find a credible source or link in the internet,saw this news on facebook.does anyone has any info about this incident?