| Standards | CCI L1 | SCR L1 | SCR L2 | Inspiration CCR L2 | TRD L3 | CCE / ERE L5 (4) |
| Max Course Depth |
10 m | 20 m | 30 m | 30 m | 50 m | 100 m |
| Min Course Depth |
6 m | 10 m | 10 m | 10 m | 30 m | 60 m |
| Max Deco | N/A | N/A | N/A | N/A | 30 min | As Required |
| Max PO2Deco | N/A | N/A | N/A | N/A | 1.6 PO2 | 1.6 PO2 |
| Gas Limits 02 | 1.45 PO2 | 1.45 PO2 | 1.45 PO2 | 1.45 PO2 | 1.45 PO2 | 1.45 PO2 |
| Gas Limits N2 | 4.0 PN2 | 4.0 PN2 | 4.0 PN2 | 4.0 PN2 | 4.0 PN2 | 4.0 PN2 |
| Min Theory Time | 2 Hours | 8 Hours + 1 poll dive | 16 Hours | 16 Hours | 16 Hours | 30 Hours (2) |
| # of Dives | 1* | 2* | 2 pool dives 4-6* |
2 pool dives 6-8* OW | 4* | 6-10 (3) |
| Min CE Water Time |
Optional | 120 min | 120 min | 180 min | Optional | Optional |
| Min OW Bottom Time | 30 min | 100 min | 180 min | 300 min | 120 min | 120 min |
| Min Run Time | N/A | N/A | N/A | N/A | 180 min | 240 min |
| Prerequisites (3) | OW Certified | OWD +LSU + 10 prior OW dives | CSU + 20 dives or AOW | OWD +CSU* + 50 prior OW dives |
SCR/CCR + 25 rebreather dives |
TRD + 200 prior OW dives +50 rebreather dives |
| * - see the Instructor procedures for the specific dives. Other prereq's may apply |
| 1 - Includes CSU Lectures |
| 2 - Includes ERD & CCR and TMD Lectures |
| 3 - All rebreather courses are unit specific - times or dives may vary |
| 4 - CCR only |