tech course

I'm doing IANTD Advanced Nitrox (in sidemount). Today I had to do a no mask, no reg swim for 15m. I failed and didn't even make it halfway without reaching for my regulator, at which point I realised I'd dropped my mask and nearly panicked. Not great :( My question is, how long should this swim...

Hey Everyone! I recently did my TDI Intro to Tech in the Gilis and I'm planning to visit Thailand in Dec '22 to do a few tech courses - TDI AN+Helitrox, followed by TDI Trimix. I believe it will take me 8-10 days to work through both of these courses, so am planning for a 12-14 day trip. The...