This is one of the most heavily used maritime routes in the world so floating debris and bodies should be spotted. Fishermen will be out when the weather clears and the pirates are probably already out looking for floating wallets, money, passports, credit cards and anything else they can steal.
Pirates off the east coast of Sumatra? A few hundred miles south of Singapore in one of the narrowest and busiest shipping lanes in the world, patrolled by the navies of at least four countries?
Are you sure?
I’ve never heard of pirates operating to any large degree in that area.
I see there are a few pirates in the Malacca Strait but they are small-scale operators picking off a few small coastal traders, not on the scale of Somalia. I wouldn’t think they would risk going south to Belitung in the middle of a massive air-sea rescue operation crawling with coastguard, police, navy and air force on the off chance of picking up some tourists’ wallets though