CCR 45

CCR DECO DIVER 45 COURSE

AIR 40 / TRIMIX 45

The objective of this course is to learn how to plan and conduct decompression dives using a Poseidon rebreather, with either air or trimix as diluent.

The course includes the use of breathing gases containing a minimum of 20% O₂ and a maximum of 35% He. The maximum depth is 40 meters when using air as the diluent, and 45 meters when using trimix.

Decompression gases with up to 100% oxygen are used during ascent.

Start Course

PREREQUISITES

Be at least 18 years of age.
Hold an Advanced Nitrox certification or equivalent, issued by an internationally recognized organization.
Have a minimum of 40 documented decompression dives recorded in the diver’s logbook.
Hold a Poseidon CCR Diver 30 m certification.
Have a minimum of 20 logged dives using the Poseidon CCR.
Submit a valid Medical Statement.
Hold mandatory dive accident insurance covering dives up to 45 meters and the use of CCR

COURSE PLANNING

The POSEIDON CCR DECO DIVER 45 course is conducted over four (4) days.
It includes an initial day focused on theory, equipment setup, pre-dive checks, land drills, and one (1) confined water dive, followed by three (3) days of open water diving with a minimum of six (6) dives and at least 420 minutes of rebreather in-water time.

SCHEDULE

DAY 1

Theory Session 1
Theory Session 2
POSEIDON CCR configuration workshop
Confined Water Dive

DAY 2

Dives 1 & 2

DAY 3

Dives 3 & 4

DAY 4

Dives 5 & 6

THEORY TOPICS

History of CCR and Rebreathers
Development of POSEIDON CCR
How CCR systems work
Types of CCRs:
- SCR
- CCR
- mCCR
- eCCR
- SSR
CCR configurations:
- Backmount
- Chest mount
- Sidemount
POSEIDON CCR practical mechanics:
- Assembly & disassembly
- Checklists
- Unit design overview
- Canister & Sofnolime
- Loop & BOV
- Minimum/optimal loop volume
Gas physiology:
- Oxygen risks (hypoxia, hyperoxia)
- CO₂ toxicity (hypercapnia)
- Nitrogen absorption
- Benefits of Trimix (20% O₂ / 35% He)
Canister filling
Electronic & manual systems
O₂ metabolism calculations
O₂ sensors & calibration
Dive tables
Constant PO₂ theory
CNS & OTU management
Dive computers:
- Gas mix adjustment
- Constant PO₂
- Gradient factors / conservatism
- Integrated O₂
Dive Planning:
- Operational planning
- Gas consumption
- Canister duration
- Gas requirements including bailout scenarios
- O₂ and N₂ limitations
Emergency procedures:
- Flooded loop
- Cell failures
- Battery failures
- Electronic failures

SKILLS DEVELOPMENT

Pre-dive checks
Equipment assembly
Canister filling
Loop verification:
- Non-return valves
- Positive/negative pressure tests
Gas analysis (O₂ and Diluent)

Pre-dive planning procedures:

System performance limits
O₂ exposure limits at chosen PO₂
N₂ absorption at planned depth & setpoint
Choosing appropriate gradient factors
Thermal considerations

In-water Skills

Familiarization with BOV
Bubble check at 3–6m
Adjusting overpressure valve & counterlungs
Bailout transitions
Gas loss scenarios
Hose/loop failure
Flooded canister
CO₂ buildup
High/low O₂
Open circuit bailout
Rescue skills
Buoyancy control system
Manual O₂ control
Switching from manual to electronic (if applicable)
HUD & dive computer use
DSMB deployment
Mask removal & replacement
Executing dives within planned limits
Safety stops
Loop volume management
Cell validation using O₂ and diluent

Post-dive Procedures

Cleaning BOV & hoses
Disinfection & inspection
Maintenance and care
Cell replacement
Battery charging
Logging dives in the POSEIDON REEF App

Decompression Skills

Detach and reattach bailout cylinder at depth
Respond to stage bottle leaks (valve, 1st/2nd stage, SPG)
Respond to a free-flowing stage regulator
Gas sharing during decompression
Switch POSEIDON CCR to O₂ mode below 6m
Simulate full bailout scenario requiring decompression

DEPTH LIMITATIONS

With Air Diluent

At least 2 dives must exceed 30 meters
All dives must remain within 40 meters max depth

With Trimix Diluent

At least 2 dives must exceed 35 meters
All dives must remain within 45 meters max depth

Upgrade Credits

From CCR Diver 30 to Deco Diver 40 (Air Diluent):
→ 1 evaluation dive + minimum of 4 dives, 2 of them deeper than 30m (2 days)
From CCR Diver 30 to Deco Diver 45 (Trimix Diluent):
→ 1 evaluation dive + minimum of 4 dives, 2 of them deeper than 35m (2 days)
From Deco Diver 40 to Deco Diver 45 (Trimix Diluent):
→ Minimum of 2 dives, both deeper than 35m (2 days)

RATIO

Minimum group: 2 students
Maximum group: 4 students

COURSE PRICE 999€

INCLUDED

Study materials + exam
All theory sessions
Minimum of 1 confined water dive
Minimum of 6 open water dives
POSEIDON International Certification

NOT INCLUDED

RSTC Agency Certification Price
Student accommodation and meals
Student costs (paid directly to the dive center):
- Gas fills
- Boat dives
- Pool rental

Instructor expenses (to be split among students):
- Instructor gas fills
- Boat dives
- Pool rental
- Instructor travel (fuel, tolls)
- Instructor accommodation
- Instructor meals
VAT

EQUIPMENT RENTAL IF NECESSARY

POSEIDON Se7en+ CCR Rental: 249€ per person/course
POSEIDON M28 Bailout Computer: 10€/day
Stage Cylinder Rental: 10€/day
POSEIDON Stage Regulator: 10€/day
Sodalime: 10€/kg

AFTER THIS COURSE

Upon successful completion, you’ll be certified to dive independently (without direct or indirect supervision) with the POSEIDON Se7en CCR up to:

40 meters with Air Diluent
45 meters with Trimix Diluent

You can then continue your progression with the next level:

→ POSEIDON CCR TRIMIX 60M

CONTACT US

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