The collision resulted in the death of the transport boat’s driver, Prakij Saisema, 69.
A scuba-diving team Monday continued their search for Prakij’s body without success at the scene of the accident, a waterfall.
The inspections include drivers’ health and stemmed from a police report that the driver of the tourist boat, Weerayuth Satthasuk, 24, was short-sighted and could not see the other boat properly.