The death toll of the accident climbed to 15 on Monday and 16 others were still unaccounted for.
Vurrd Lim S wrote on his Facebook page that when the boat passed him, the passengers even waved at him, RIP.
The accident took place at around 4pm in Ayutthaya province, when the overcrowded Sombatmongkonchai boat smashed into a pole in front of the Sanam Chai Temple after avoiding a collision with a large cargo boat.
The vessel, designed to carry 50 passengers, had more than 150 passengers on board at the time of the accident, according to some estimates.
"Many passengers tried to jump out of the boat and scrambled towards the shore, which was about three to five metres away," Annop Kudeephan, a 50-year-old survivor, recounted.