Our online training is suitable for all levels of scuba divers, whether you're a newly certified or highly experienced recreational, technical diver or dive instructor my online training will benefit you. www.sidemounting.com/the-courses/ It is modular in design so you can watch and re-watch all sections as many times as you like, each course is broken down into small manageable sections, each with many 3, 5, 10 or 15 minute single video based lessons. Out of all 347 lessons, average length is 8.5 Minutes. All videos have complete English subtitles. You just choose your chosen equipment configuration, backmount single and twinset, sidemount or technical multi-cylinder. Note all HD training videos are edited with a complete voice-over using the latest production quality audio and video recording equipment available.