To dive beyond 130ft, decompression divers should add some Helium to their cylinders. This will allow them to enter the realm of the seldom seen. Sometimes, the reefs and wrecks they visit are visited less often per year than astronauts to orbit the moon.
Continue on to the Tec Sidemount Diver program. Here you'll learn additional skills, such switching deco cylinders, and stage and switch deco cylinders.
There are two options available with most agencies: technical Sidemount or recreational Sidemount. Similar prerequisites apply to both TDI or SDI. However, the tec-sidemount course will increase your skills. The course will also require you to learn more about them. Perfect trim and maintaining your level during the skill development is a must.
Sidemount diving is a form of sidemount diving that originated in cave diving but has been incorporated into recreational and non-overhead diving over the years. Simply put, your tanks will be worn on your side instead of being attached to your back. The tanks attach to a Sidemount BCD with clips or bungee chords, allowing for maximum flexibility. It was this flexibility that cave divers used to be able to lift their tanks from the bottom underwater, making it easier to pass through tight spaces.
Sidemount Diver Specialty can count towards Advanced Open Water Diver certification. Talk to your instructor about earning credit.
Divers who are comfortable with sidemount diving can also enjoy open-water dives. Why? Because sidemount diving is very easy and comfortable.
Along with the Sidemount equipment that is specialized, you will also need your typical wetsuits, fins, masks, computer, compass, DSMB and other necessary equipment.
You will also learn how to use Sidemount regulators. Usually, you will have one regulator on a long hose as well as one regulator on a short hose with a necklace. Unlike your normal regs, Sidemount regs are also marked so you can easily distinguish which tank you are breathing from. During my training, this included a swivel joint for my short hose regulator. In addition, you will have 2 SPGs – one for each first stage.
Sidemount cylinder mounting originated for cave diving and have become more popular in all forms of technical diving since. They separate the dual cylinders, with a 1st stage on each cylinder, and mount them on either side of the diver’s body. This doesn’t allow the diver to breathe from either cylinder in the event of a regulator failure, but does give the diver easier access to valves. Sidemount diving gives the diver a larger horizontal profile, but a smaller vertical profile.
Sidemount diving requires only an Open Water Diver to begin. Although it's important to have excellent buoyancy and trim, you should also be able handle your equipment independently. Sidemount diving offers a whole new level of skill and equipment setup.
International Training, parent organization to Technical Diving International / Scuba Diving International (TDI), and Technical Diving International / Scuba Diving International - offers both TDI and SDI versions of the Sidemount Diver course. Both courses have a lot in common. Both courses use identical learning materials (which we also wrote). So, what is the difference?
To make dives beyond 130ft, decompression divers will add Helium to the cylinders. Then they can explore the realm of the uncommon. Their experiences at wrecks and reefs are often less frequent than those of astronauts who visit the moon.
So if you want to dive sidemount, especially if you are already a tec diver, you need to learn your new rig, how to adjust it, how to enter into the water with it (yes it is very different, more relax too, though), and so much more.
Tec 40 is the first step to start the TecRec program with Padi. The prerequisites are Advanced Open Water and Deep Diver certifications as well as Nitrox. In addition to that, before starting the course a minimum of 10 Nitrox dives have to be proved. The certification allows divers to dive to 40m doing limited decompression using gas mixes up to 50% of oxygen. The Tec 40 is also the prerequisite to continue with Padi Tec 45 which allows to do unlimited decompression time as long as it is carefully planned. The next step will be Tec 50 that enhances the allowable depth to 50m.
To begin a technical diving course, you must have completed the following prerequisites: a PADI Advanced Open Water Diver certificate or equivalent, a PADI Enriched Air Diver certificate or equivalent, and a PADI Deep Diver certificate or proof of at least 10 dives to 30 metres/100 feet.
According to experts, approximately 40% of technical divers enroll in additional education and training programs. This yields a reasonable estimate of approximately 160,000 active technical divers worldwide.
Have a PADI Deep Specialty Instructor certification or have completed a PADI Deep Specialty Instructor course. Have at least 100 logged dives, including at least 20 enriched air dives, 25 dives deeper than 18 meters/60 feet, and 15 dives deeper than 30 meters/100 feet. You can become a Tec 45 diver.