BSAC Sports Mixed Gas Diver
The Sports Mixed Gas Diver course is open to any Sports Diver or equivalent who have completed the Accelerated Decompression Procedures course. The course teaches the divers to safely use Tri Mix mixtures up to 20% oxygen and 30% helium to help reduce the effects of nitrogen narcosis during deeper dives. The course also expands the students depth experience to 50m
The Sports Mixed Gas diver course consists of the following elements:
· Six classroom lessons
· A theory assessment
· A dry practical lesson of 90 minutes
· One or more confined water lessons of not less than 90 minutes total in-water duration
· Two open water lessons, dependant on student performance, with a total underwater duration of not less than 120 minutes and an individual lesson duration of not less than 45 minutes.
All practical training conducted in both confined and open water includes the achievement of specific performance standards at appropriate points throughout the lessons.
The theory lessons consist of 6 modules and will take you through all the necessary knowledge to be able to plan and dive safely using Tri Mix. The theory will take you through all the necessary equipment you will be using as well as covering the role of a dive manager with Tri Mix divers. The 6 theory lessons include:
• Introduction to Sports Mixed Gas Diving
• Equipment and Decompression Procedures
• Dive Planning
• Dive Manager Liaison
Upon completion of the 6 theory lessons the students will be required to complete an exam consisting of 36 questions. The pass rate is 80%
Practical Dry Lesson
This is used as a configuration workshop. As an Accelerated Decomprssion Diver already you will already have some idea of your own personal equipment configuration so this may mean that there will be some tweaking here and there when introducing the Helium related equipment.
The skills lesson is conducted in a confined water environment in which the depth will not exceed 10 metres maximum depth.
The following skills to master in this section are:
Dive briefings, accurate gas analyzing, show your ability to use both twin set cylinder configuration and stage cylinder skills, proper weighting and trim, gas switching achieving natural buoyancy at one metre increments on the ascent, mask exchange, isolator shutdown procedures, dealing with hose/regulator failure, remove and refit stage cylinders, breathing from buddy’s second regulator, Deployment of a DSMB and conduct your decompression stops within 0.5 +/- of a metre. These skill are just a few to mention.
Open Water Dives
Both open water dives will start with a meticulous dive plan being performed. Dive profiling, gas requirements, gas analyzing, emergency back up plans etc should all be incorporated within this plan.
The maximum depth of dive 1, should not exceed 50 metres. On this dive you will perform the following skills,
Descend and conduct a bubble check. On reaching the seabed you will then demonstration effective buoyancy and trim. You will then conduct cylinder isolation procedure followed by gas switching skills.
On the dive phase you will be expected to establish effective gas monitoring and run time management. At the end of the dive you will conduct a mid-water deployment of a DSMB. On reaching your deco stop, you will then run through an exercise where you will hand off your stage gas to your buddy. At this stage you will also carry out your decompression stops as required.
On this dive you will plan a dive with an ascent/decompression time between 30 -45 minutes. Again the maximum depth should not exceed 50 metres. The procedure for this dive is identical to dive 1with the exception of the hand off stage cylinder skill.
On surfacing from both of these dives the diver will follow some post dive actions, such as breathing a rich gas for a period of time and drinking fluids, plus equipment shutdown procedures.