I don't understand all these comments, if your home address is in Thailand and you're working outside Thailand that is remote work. My DTV was approved, the only thing my work contract had to state was remote work, offshore is about as remote as you can get. I have no idea about the posters actual question.
I'm in a similar situation to you, I work on ships with an irregular rotation. I ended up applying and receiving a remote worker DTV while on holiday in Sydney Aus.
My contract didn't state remote work and Sydney asked for a new contract stating remote work, approved after I sent a new contract. I did send payslips and bank statements to match, but I was not asked to.