CCR O2ptima Diver training
The level of Advanced Nitrox Diver is a prerequisite in order to enroll into a CCR Diver O2ptima course. If you do not have previously done your Adv. Eanx course we can combine both training programs into one.
A minimum of six complete training days is required to complete the training neccecary for the basic or Mod. I CCR O2ptima Rebreather diver.
Training for the CCR O2ptima is available with us to the following diver levels:
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Basic CCR O2ptima Diver
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Normoxic Trimix CCR Diver
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CCR Wreck Diver
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Advanced CCR Wreck Diver
Certification cards will be issued through IANTD
CCR Diver training comes in a variety of levels ranging from OW CCR Diver (max depth 70 feet / 21 meter) to CCR Diver (max depth 130 feet / 39 meter), Normoxic Trimix CCR (max depth 200 feet / 60 meter), Trimix CCR Diver (max depth 333 feet / 100 meter) and Expedition CCR Trimix Diver (max depth 400 feet / 120 meter).
Below is a sample of how the average CCR Diver course ( max depth 130 feet / 39 meter) may be conducted as a training minimum. Training standards may change without prior notice. Prior to course beginning the latest version of Rebreather training agency standards must be consulted.
Course Outline CCR Rebreather Diver course
Paperwork
Verify that student has the IANTD CCR training manual corresponding to the type and CCR model the course is conducted with. We strongly recommend the purchase of the IANTD Technical Diver Encyclopedia and the Understanding of Rebreather book
Complete liability release. Complete medical statement, if in doubt require medical examination by Hyperbaric physician
Verify that student understands the financial obligation resulting in his or her training, refer to actual training location price list. We emphasize to have full payments done before the course starts or is completed. The Instructor is required to fill out the IANTD student performance track sheets
Lectures and Training dives
Most lectures can be done during the first day where the most critical lectures have to be completed in order to commence diving operations during confined water training and training day two
The use of the IANTD CCR Diver course PowerPoint presentation corresponding to the unit used during the course is required to guide the Instructor through the lectures
Students are encouraged to own their personal CCR plus additional dive equipment such as bail out stage and regulator if needed, lift bag, reel, slate, submersible dive tables, surface marker buoy, chronometer, wrist mounted computer, mask, suit and fins
Verify enough oxygen, diluent and bail out tanks are available for training dives and duration. Verify all tanks are full, verify you have enough wing nuts. Verify your bail out stage tanks are filled with gas required for confined water and later on training dives. Prepare paperwork the evening before class starts. Verify that enough oxygen is available at training location, if not order more
Verify that you have emergency oxygen, a first aid kit and emergency phone numbers ready and available for all diving days to be part of your standards emergency response gear
Training limits
Maximum Po2 1.2 / 1.3 depending on CCR at the bottom, 1.4 at deco
No-decompression diving during the course, simulated decompression stops can be implemented
If CCR course is to be taken in conjunction wit Advanced Eanx course decompression diving during the Advanced Nitrox diver course phase with no more then 10 – 15 minutes of total decompression and with no deeper stops then the 20 feet – 6 meter stop
No dives deeper then 130 feet – 39 meters
Total in-water time minimum 500 minutes, 8 dives must be done between 30 – 130 feet / 9 – 39 meters
On all dives a 3 minute safety stop has to be implemented as mimimum
Day 1
Lectures approximately 3 hours of lecture including:
Introduction, paperwork, structure of course and layout, settle financial issues
Opencircuit review
Semi closed rebreather review
Closed circuit rebreather review
Rebreather history
Ten rules for CCR diving
Specific rebreather design about CCR used for the course
Power on, display, electronics, batteries, tanks, feeding hoses
Lid, solenoid, sensors, calibration air and oxygen
Counterlungs, loop, DSV, ADV, HUD or DIVA, hydrostatic effect
Absorbent canister design, packing, closing of unit
Co2 absorption, absorbent material and grades available
Breathing characteristics, face masks
Pre dive checks, check list, pre breathe
In-water check, descent, set point change, buoyancy
Minimal lung volume, ascents
Failure modes – flooding, hyperoxia, hypoxia, hypercapnia, solenoid failure, complete electronics failure
Oxygen metabolism, psychological considerations, respiratory considerations, gas consumption, oxygen metabolism and consumption
Oxygen toxicity CNS and pulmonary with calculations and limits
Decompression efficiency , risk assessment
Rebreather formulas – Daltons law, END, MOD,
Disinfecting, post dive storage
Equipment workshop approximately 2 hours including:
Explanation, demonstration, assembly and preparation of CCR unit and bail out, absorbent packing, electronics introduction, pre-breathe
Assemble all student gear in a dust free and dry area and transport assembled to training dive site. Care has to taken not to break the equipment in transport
Day 2
Confined water training approximately 5 hours including:
Briefing on site
Walk students through pre-dive check sequence, have work students as team
Remind students to always close mouthpiece when it comes out of mouth
Breathe unit at rest on surface and underwater, when comfortable swim unit
Oral inflation of BC for buoyancy control, then auto inflation
Practice buoyancy with counterlungs as back up
With use of BC maintain stable depth motionless
Perform a gradual and controlled ascent, repeat during descent
Complete rapid swims for student comfort and system understanding
Students are to swim at various depth and adjust counterlung volume
Introduce and maintain minimum counterlung volume, have student swim unit using - minimum lung volume technique
Allow time for technique practice, readjustment, trim and configuring of unit
Practice OC bail out
Demonstrate, practice and perform hypoxia drill
Demonstrate, practice and perform hyperoxia drill
Demonstrate, practice and perform failed solenoid drill in open and closed position drill
Demonstrate, practice and perform hypercapnia drill
Demonstrate, practice and perform flooding drill partially flooded partial loop and flooded complete canister
Controlling the unit manually
SCR operation on CCR
Internal and external boom scenarios
Post dive procedures, clean up and storage with use of check sheet
Upon return to training location drop oxygen and diluent tanks at fill station, verify that enough Eanx or air is remaining in bail out bottles, if not organize refill and remix, log dives with students, explain to students the events on next training day, fill out IANTD student performance track chart. Verify that a boat reservation is confirmed for next training day if the dives are to be done in the ocean
Day 3
Lectures approximately 2 hours of lecture and preparations including:
CCR preparation and assembly using check list
Briefing for the training dives to come
Dive planning using:
IANTD Po2 1.2 air diluent tables
END concept and air tables
Eanx tables
Calculating Oxygen exposure CNS% and OTU
Dive 1 depth range 30 – 66 feet / 9 – 18 meters
Recommended bottom time at depth 65 minutes, watch no-deco time limits
Transport CCR, tanks and equipment separate to dive site, assemble equipment, give ample time ( 60 minutes minimum ) for assembly before planned boat departure time
Analyze all tanks including stages, all Eanx mixtures have to be logged into the fill log, all tanks have to be marked properly with content label
Brief students on how to get to the boat or dive site, how to enter the boat, location of seats, where to place bail out stage on boat, how to enter the boat later after diving either by ladder or taking of tanks in the water
Verify that all students have no-decompression profile on a slate on and that all dive schedules are the same within the team
Before entering the water on a boat verify that all valves are open, that all wings are inflated and fins are on. Verify that all hand sets are on, computers are on, pr-breathe once more on the boat. Verify that students know what the mission is
( time 3 minutes, time and pressure 6 minutes for example )
All divers enter the water at the same time, boat is pulling away, before descending synchronize time by chronometer activation simultaneously
Reunite the team at 20 feet – 6 meter for bubble check and climatize
If all is well commence dive as planned, have students give you a time check every 3 minutes on the bottom and a time and pressure check every 6 minutes on the bottom. During the pressure checks the team leader has to write his pressure onto a slate and ask all teammates for their pressure, writing the pressures onto the slate as well. The information is needed later to calculate RMV rates for each diver on each dive. Nitrogen narcosis or stress can be seen as well in the way it was written onto the slate
During descent watch diluent inflation is keeping up with rate of descent
Switch over to high set point 1.2 or 1.3 at predetermined depth
Switch to a set point of 1.0 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually during this dive
Monitor hand sets and pressure gauges every 1 - 4 minutes
Perform a hypoxia drill during the dive
Perform a partially flooded loop scenario during the dive
Perform hypercapnia drill, have student go to OC and back to CC during the dive
Call the dive one minute before planned termination time to allow team collection
During ascent and at stable depth during deep stop team leader is to deploy a lift bag. One lift bag per team, not one lift bag per diver
During ascent at a depth between 6 – 9 meters the set point has to be switched from high set point to low set point. Potentially the set point has to be kept high manually
After completing safety stop team is to rest before entering the boat. If boat is not immediately available a surface marker buoy has to be deployed
When back in the boat de-brief, offer solutions for student problems, and decide if a second dive can be made. Rehydrate. Erase dive plan from slates and write second dive plan onto the slate
Dive 2 depth range 30 – 66 feet / 9 – 18 meters
Recommended bottom time at depth 65 minutes, watch no-deco time limits
Verify that all students have no-decompression profile on a slate on and that all dive schedules are the same within the team
Brief students on how to enter the water and remind them to hold on to the bail out stage tank to prevent face injury
Before entering the water on a boat verify that all valves are open, that all wings are inflated and fins are on. Verify that all hand sets are on, computers are on, pr-breathe once more on the boat. Verify that students know what the mission is
( time 3 minutes, time and pressure 6 minutes for example )
All divers enter the water at the same time, boat is pulling away, before descending synchronize time by chronometer activation simultaneously
Reunite the team at 20 feet – 6 meter for bubble check and climatize
If all is well commence dive as planned, have students give you a time check every 3 minutes on the bottom and a time and pressure check every 6 minutes on the bottom. During the pressure checks the team leader has to write his pressure onto a slate and ask all teammates for their pressure, writing the pressures onto the slate as well. The information is needed later to calculate RMV rates for each diver on each dive. Nitrogen narcosis or stress can be seen as well in the way it was written onto the slate
During descent watch diluent inflation is keeping up with rate of descent
Switch over to high set point 1.2 or 1.3 at predetermined depth
Switch to a set point of 1.0 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually during this dive
Monitor hand sets and pressure gauges every 1 - 4 minutes
On a sandy patch give students the student reaction scenarios, students provide written response to cause and action to be taken to give scenario
Perform a hyperoxia drill during the dive
Internal and external boom scenario
Perform a completely flooded loop scenario during the dive
Perform hypercapnia drill, have students go to OC and perform an ascent to the safety stop depth, then return to CC
Call the dive one minute before planned termination time to allow team collection
During ascent and at stable depth during deep stop team leader is to deploy a lift bag. One lift bag per team, not one lift bag per diver
During ascent at a depth between 6 – 9 meters the set point has to be switched from high set point to low set point. Potentially the set point has to be kept high manually
After completing safety stop team is to rest before entering the boat. If boat is not immediately available a surface marker buoy has to be deployed
When back in the boat or back on shore resting de-brief, offer solutions for student problems
Upon return to training location drop oxygen and diluent tanks at fill station, verify that enough Eanx or air is remaining in bail out bottles, if not organize refill and remix, log dives with students, explain to students the events on next training day, fill out IANTD student performance track chart. Verify that a boat reservation is confirmed for next training day if the dives are to be done in the ocean
Day 4
Lectures approximately 2 hours of lecture and preparations including:
CCR preparation and assembly using check list
Briefing for the training dives to come
Dive planning using:
IANTD Po2 1.2 air diluent tables
END concept and air tables
Eanx tables
Calculating Oxygen exposure CNS% and OTU
Dive 1 depth range 50 – 80 feet / 15 – 24 meters
Recommended bottom time at depth 65 minutes, watch no-deco time limits
Transport CCR, tanks and equipment separate to dive site, assemble equipment, give ample time ( 30 minutes minimum ) for assembly before planned boat departure time
Analyze all tanks including stages, all Eanx mixtures have to be logged into the fill log, all tanks have to be marked properly with content label
Brief students on how to get to the boat or dive site, how to enter the boat, location of seats, where to place bail out stage on boat, how to enter the boat later after diving either by ladder or taking of tanks in the water
Verify that all students have no-decompression profile on a slate on and that all dive schedules are the same within the team
Before entering the water on a boat verify that all valves are open, that all wings are inflated and fins are on. Verify that all hand sets are on, computers are on, pr-breathe once more on the boat. Verify that students know what the mission is
( time 3 minutes, time and pressure 6 minutes for example )
All divers enter the water at the same time, boat is pulling away, before descending synchronize time by chronometer activation simultaneously
Reunite the team at 20 feet – 6 meter for bubble check and climatize
If all is well commence dive as planned, have students give you a time check every 3 minutes on the bottom and a time and pressure check every 6 minutes on the bottom. During the pressure checks the team leader has to write his pressure onto a slate and ask all teammates for their pressure, writing the pressures onto the slate as well. The information is needed later to calculate RMV rates for each diver on each dive. Nitrogen narcosis or stress can be seen as well in the way it was written onto the slate
During descent watch diluent inflation is keeping up with rate of descent
Switch over to high set point 1.2 or 1.3 at predetermined depth
Switch to a set point of 1.0 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually half of this dive
Switch to a set point of 1.4 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually during half of this dive
Monitor hand sets and pressure gauges every 1 - 4 minutes, dive the unit on minimum counterlung volume
Perform a hypoxia drill during the dive
Perform a partially flooded loop scenario during the dive
Perform hypercapnia drill, have student go to OC and back to CC during the dive
Perform a hypoxia drill during the dive
Internal and external boom scenario
Call the dive one minute before planned termination time to allow team collection
During ascent and at stable depth during deep stop team leader is to deploy a lift bag. One lift bag per team, not one lift bag per diver
During ascent at a depth between 6 – 9 meters the set point has to be switched from high set point to low set point. Potentially the set point has to be kept high manually
After completing safety stop team is to rest before entering the boat. If boat is not immediately available a surface marker buoy has to be deployed
When back in the boat de-brief, offer solutions for student problems, and decide if a second dive can be made. Rehydrate. Erase dive plan from slates and write second dive plan onto the slate
Dive 2 depth range 30 – 50 feet / 9 – 15 meters
Recommended bottom time at depth 65 minutes, watch no-deco time limits
Verify that all students have no-decompression profile on a slate on and that all dive schedules are the same within the team
Brief students on how to enter the water and remind them to hold on to the bail out stage tank to prevent face injury
Before entering the water on a boat verify that all valves are open, that all wings are inflated and fins are on. Verify that all hand sets are on, computers are on, pr-breathe once more on the boat. Verify that students know what the mission is
( time 3 minutes, time and pressure 6 minutes for example )
All divers enter the water at the same time, boat is pulling away, before descending synchronize time by chronometer activation simultaneously
Reunite the team at 20 feet – 6 meter for bubble check and climatize
If all is well commence dive as planned, have students give you a time check every 3 minutes on the bottom and a time and pressure check every 6 minutes on the bottom. During the pressure checks the team leader has to write his pressure onto a slate and ask all teammates for their pressure, writing the pressures onto the slate as well. The information is needed later to calculate RMV rates for each diver on each dive. Nitrogen narcosis or stress can be seen as well in the way it was written onto the slate
During descent watch diluent inflation is keeping up with rate of descent
Switch over to high set point 1.2 or 1.3 at predetermined depth
Switch to a set point of 1.0 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually half of this dive
On a sandy patch give students the student reaction scenarios, students provide written response to cause and action to be taken to give scenario
Switch to a set point of 1.4 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually during half of this dive
Monitor hand sets and pressure gauges every 1 - 4 minutes, dive the unit on minimum counterlung volume
Perform a hypoxia drill during the dive
Perform a complete flooded loop scenario during the dive
Perform a hyperoxia drill during the dive
Perform a 15 minute SCR bail out scenario
Call the dive one minute before planned termination time to allow team collection
Perform hypercapnia drill, have student go to OC and bail out to the surface but complete the safety stop
During ascent at a depth between 6 – 9 meters the set point has to be switched from high set point to low set point. Potentially the set point has to be kept high manually
After completing safety stop team is to rest before entering the boat. If boat is not immediately available a surface marker buoy has to be deployed
When back in the boat or back on shore resting de-brief, offer solutions for student problems
Upon return to training location drop oxygen and diluent tanks at fill station, verify that enough Eanx or air is remaining in bail out bottles, if not organize refill and remix, log dives with students, explain to students the events on next training day, fill out IANTD student performance track chart. Verify that a boat reservation is confirmed for next training day if the dives are to be done in the ocean
Day 5
Lectures approximately 2 hours of lecture and preparations including:
CCR preparation and assembly using check list
Briefing for the training dives to come
Dive planning using:
IANTD Po2 1.2 air diluent tables
END concept and air tables
Eanx tables
Calculating Oxygen exposure CNS% and OTU
Dive 1 depth range 70 – 90 feet / 21 – 27 meters
Recommended bottom time at depth 65 minutes, watch no-deco time limits
Transport CCR, tanks and equipment separate to dive site, assemble equipment, give ample time ( 30 minutes minimum ) for assembly before planned boat departure time
Analyze all tanks including stages, all Eanx mixtures have to be logged into the fill log, all tanks have to be marked properly with content label
Brief students on how to get to the boat or dive site, how to enter the boat, location of seats, where to place bail out stage on boat, how to enter the boat later after diving either by ladder or taking of tanks in the water
Verify that all students have no-decompression profile on a slate on and that all dive schedules are the same within the team
Before entering the water on a boat verify that all valves are open, that all wings are inflated and fins are on. Verify that all hand sets are on, computers are on, pr-breathe once more on the boat. Verify that students know what the mission is
( time 3 minutes, time and pressure 6 minutes for example )
All divers enter the water at the same time, boat is pulling away, before descending synchronize time by chronometer activation simultaneously
Reunite the team at 20 feet – 6 meter for bubble check and climatize
If all is well commence dive as planned, have students give you a time check every 3 minutes on the bottom and a time and pressure check every 6 minutes on the bottom. During the pressure checks the team leader has to write his pressure onto a slate and ask all teammates for their pressure, writing the pressures onto the slate as well. The information is needed later to calculate RMV rates for each diver on each dive. Nitrogen narcosis or stress can be seen as well in the way it was written onto the slate
During descent watch diluent inflation is keeping up with rate of descent
Switch over to high set point 1.2 or 1.3 at predetermined depth
Switch to a set point of 1.0 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually half of this dive
Switch to a set point of 1.4 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually during half of this dive
Monitor hand sets and pressure gauges every 1 - 4 minutes, dive the unit on minimum counterlung volume
Perform a hypoxia drill during the dive
Perform a partially flooded loop scenario during the dive
Perform hypercapnia drill, have student go to OC and back to CC during the dive
Perform a hypoxia drill during the dive
Call the dive one minute before planned termination time to allow team collection
During ascent and at stable depth during deep stop team leader is to deploy a lift bag. One lift bag per team, not one lift bag per diver
During ascent at a depth between 6 – 9 meters the set point has to be switched from high set point to low set point. Potentially the set point has to be kept high manually
After completing safety stop team is to rest before entering the boat. If boat is not immediately available a surface marker buoy has to be deployed
When back in the boat de-brief, offer solutions for student problems, and decide if a second dive can be made. Rehydrate. Erase dive plan from slates and write second dive plan onto the slate
Dive 2 depth range 30 – 50 feet / 9 – 15 meters
Recommended bottom time at depth 65 minutes, watch no-deco time limits
Verify that all students have no-decompression profile on a slate on and that all dive schedules are the same within the team
Brief students on how to enter the water and remind them to hold on to the bail out stage tank to prevent face injury
Before entering the water on a boat verify that all valves are open, that all wings are inflated and fins are on. Verify that all hand sets are on, computers are on, pr-breathe once more on the boat. Verify that students know what the mission is
( time 3 minutes, time and pressure 6 minutes for example )
All divers enter the water at the same time, boat is pulling away, before descending synchronize time by chronometer activation simultaneously
Reunite the team at 20 feet – 6 meter for bubble check and climatize
If all is well commence dive as planned, have students give you a time check every 3 minutes on the bottom and a time and pressure check every 6 minutes on the bottom. During the pressure checks the team leader has to write his pressure onto a slate and ask all teammates for their pressure, writing the pressures onto the slate as well. The information is needed later to calculate RMV rates for each diver on each dive. Nitrogen narcosis or stress can be seen as well in the way it was written onto the slate
During descent watch diluent inflation is keeping up with rate of descent
Switch over to high set point 1.2 or 1.3 at predetermined depth
Switch to a set point of 1.0 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually half of this dive
Switch to a set point of 1.4 and maintain 1.2 or 1.3 set point manually. Unit is to be dived manually during half of this dive
Monitor hand sets and pressure gauges every 1 - 4 minutes, dive the unit on minimum counterlung volume
Perform a hypoxia drill during the dive
Perform a complete flooded loop scenario during the dive
Perform a hyperoxia drill during the dive
Perform a 15 minute SCR bail out scenario
Call the dive one minute before planned termination time to allow team collection
Perform hypercapnia drill, have student go to OC and bail out to the surface but complete the safety stop
Internal and external boom scenario
During ascent at a depth between 6 – 9 meters the set point has to be switched from high set point to low set point. Potentially the set point has to be kept high manually
After completing safety stop team is to rest before entering the boat. If boat is not immediately available a surface marker buoy has to be deployed
When back in the boat de-brief, offer solutions for student problems, and decide if a second dive can be made. Rehydrate. Erase dive plan from slates and write second dive plan onto the slate
Upon return to training location drop oxygen and diluent tanks at fill station, verify that enough Eanx or air is remaining in bail out bottles, if not organize refill and remix, log dives with students, explain to students the events on next training day, fill out IANTD student performance track chart. Verify that a boat reservation is confirmed for next training day if the dives are to be done in the ocean
Day 6
Lectures approximately 2 hours of lecture and preparations including:
Review final exam corresponding to the type and model of CCR the course is conducted with and explain questions or issues that may remain unclear
CCR preparation and assembly using check list
Briefing for the training dives to come
Dive planning using:
IANTD Po2 1.2 air diluent tables
END concept and air tables
Eanx tables
Calculating Oxygen exposure CNS% and OTU
Dive 1 depth range 90 – 130 feet / 27 – 39 meters
Recommended bottom time at depth 65 minutes, watch no-deco time limits
Transport CCR, tanks and equipment separate to dive site, assemble equipment, give ample time ( 30 minutes minimum ) for assembly before planned boat departure time
Analyze all tanks including stages, all Eanx mixtures have to be logged into the fill log, all tanks have to be marked properly with content label
Brief students on how to get to the boat or dive site, how to enter the boat, location of seats, where to place bail out stage on boat, how to enter the boat later after diving either by ladder or taking of tanks in the water
Verify that all students have no-decompression profile on a slate on and that all dive schedules are the same within the team
Before entering the water on a boat verify that all valves are open, that all wings are inflated and fins are on. Verify that all hand sets are on, computers are on, pr-breathe once more on the boat. Verify that students know what the mission is
( time 3 minutes, time and pressure 6 minutes for example )
All divers enter the water at the same time, boat is pulling away, before descending synchronize time by chronometer activation simultaneously
Reunite the team at 20 feet – 6 meter for bubble check and climatize
If all is well commence dive as planned, have students give you a time check every 3 minutes on the bottom and a time and pressure check every 6 minutes on the bottom. During the pressure checks the team leader has to write his pressure onto a slate and ask all teammates for their pressure, writing the pressures onto the slate as well. The information is needed later to calculate RMV rates for each diver on each dive. Nitrogen narcosis or stress can be seen as well in the way it was written onto the slate
During descent watch diluent inflation is keeping up with rate of descent
Switch over to high set point 1.2 or 1.3 at predetermined depth
Unit is to be dived fully electronically
Internal and external boom scenario
Call the dive one minute before planned termination time to allow team collection
During ascent and at stable depth during deep stop team leader is to deploy a lift bag. One lift bag per team, not one lift bag per diver
During ascent at a depth between 6 – 9 meters the set point has to be switched from high set point to low set point. Potentially the set point has to be kept high manually
After completing safety stop team is to rest before entering the boat. If boat is not immediately available a surface marker buoy has to be deployed
When back in the boat de-brief, offer solutions for student problems, and decide if a second dive can be made. Rehydrate. Erase dive plan from slates and write second dive plan onto the slate
Dive 2 depth range 30 – 50 feet / 9 – 15 meters
Recommended bottom time at depth 65 minutes, watch no-deco time limits
Verify that all students have no-decompression profile on a slate on and that all dive schedules are the same within the team
Brief students on how to enter the water and remind them to hold on to the bail out stage tank to prevent face injury
Before entering the water on a boat verify that all valves are open, that all wings are inflated and fins are on. Verify that all hand sets are on, computers are on, pr-breathe once more on the boat. Verify that students know what the mission is
( time 3 minutes, time and pressure 6 minutes for example )
All divers enter the water at the same time, boat is pulling away, before descending synchronize time by chronometer activation simultaneously
Reunite the team at 20 feet – 6 meter for bubble check and climatize
If all is well commence dive as planned, have students give you a time check every 3 minutes on the bottom and a time and pressure check every 6 minutes on the bottom. During the pressure checks the team leader has to write his pressure onto a slate and ask all teammates for their pressure, writing the pressures onto the slate as well. The information is needed later to calculate RMV rates for each diver on each dive. Nitrogen narcosis or stress can be seen as well in the way it was written onto the slate
During descent watch diluent inflation is keeping up with rate of descent
Switch over to high set point 1.2 or 1.3 at predetermined depth
Unit is to be dived fully electronically
Call the dive one minute before planned termination time to allow team collection
Perform hypercapnia drill, have student go to OC and bail out to the surface but complete the safety stop
During ascent at a depth between 6 – 9 meters the set point has to be switched from high set point to low set point. Potentially the set point has to be kept high manually
After completing safety stop team is to rest before entering the boat. If boat is not immediately available a surface marker buoy has to be deployed
When back in the boat or back on shore resting de-brief, offer solutions for student problems
Upon return to training location drop oxygen and diluent tanks at fill station, log dives with students, explain to students the events on next training day, fill out IANTD student performance track chart. Complete student registration form if course has been completed or discuss future continuing training to accomplish training goals
If problems during the previous training days are discovered and not solved at this time then extra training days a required prior certification until the issue is solved.
If you have any questions please do not hesitate to contact me