This was the hairy bit. River level was down, rocks poking out everywhere, but the local skipper just kept the boot in and a huge 1000hp twin turbo MTU marine diesel just screamed. The boats are easily 30m long, so they're not dinghies. The guy hanging on for all crap in front of me is a retired Rear Admiral!
This is a typical vessel, built on an old Soviet design and common on the Mekong too.