USMC CPL.
Contributor
I have but the instructor I am thinking about using said intro and then an/dp. I do research before I start asking questions.Read the standards for yourself.
https://www.tdisdi.com/wp-content/uploads/files/sandp/currentYear/TDI/part 2/pdf/individual/TDI Diver Standards_07_Advanced_Nitrox_Diver.pdf
https://www.tdisdi.com/wp-content/uploads/files/sandp/currentYear/TDI/part 2/pdf/individual/TDI Diver Standards_08_Decompression_Procedures_Diver.pdf
https://www.tdisdi.com/wp-content/uploads/files/sandp/currentYear/TDI/part 2/pdf/individual/TDI Diver Standards_03_Intro_to_Tech_Diver.pdf
I guess it would depend on where your skills currently are. Do you NEED intro to tech?