A ferry disaster that killed dozens of Chinese tourists in Thailand earlier this year has sent visitor numbers plunging from the kingdom’s single largest market, Agence-France Presse reports. The country’s tourism authority reveals that October was the hardest hit as tourist arrivals dropped 20 per cent year-on-year. On Wednesday, Thailand officially launched e-visa on arrival for visitors, which is the kingdom’s latest attempt to facilitate the immigration process of foreign tourists, according to NDTV. The Wall Street Journal reported that Thai accident investigators have begun a painstaking examination of a pleasure boat that sank in July, killing 47 Chinese tourists, with the goal of winning back the confidence of one of the single biggest contributors to Thailand’s economy.