ginti
Contributor
Say OP decides to go the TDI tech route. The prerequisites for AN/DP include nitrox and AOW. Suggest you actually look at the standards.
Probably I was not clear in my post, sorry. What I suggested is the next step for a tech-oriented path. Not ALL the steps For sure, he will need extra courses to do tech in the future; my point is that he doesn't need them now. So, in my opinion, he should start on those 4 points and then, eventually, expands his knowledge and skills with other courses and his equipment with other purchases.
Anyway, depending on the route he chooses, he may not need at all nitrox and AOW (GUE, for instance). Suggest you actually look at the standards