| Standards | Technical SafeAir Diver TSD - L3 | Technical Wreck Diver TWD - L3 | Technical Rebreather Diver TRD - L3 | Technical Trimix Diver TTM - L3 |
| Max Course Depth (1) | 50 m (49.5 m) | 44.5 m | 50 m | 50 m |
| Min Course Depth (2) |
30 m | 20 m | 30 m | 40 m |
| Min Dive Depth for Certification Credit (3) |
21 m | 18 m | 18 m | 30 m |
| Max Deco Run Time (4) |
30 min | 30 min | 30 min | 45 min |
| Max PO2Deco | 1.6 PO2 | 1.6 PO2 | 1.6 PO2 | 1.6 PO2 |
| Bottom Gas Limits 02 | 1.45 PO2 | 1.45 PO2 | 1.45 PO2 | 1.45 PO2 |
| Bottom Gas Limits N2 | 4.5 PN2 | 4.0 PN2 | 4.0 PN2 | 3.2 PN2 |
| Bottom Gas Limits He | N/A | N/A | N/A | 16% Minimum |
| Theory Time | 14-16 Hours | 6-8 Hours | 16 Hours | 4-6 Hours (5) |
| # of Dives | 4* | 5* | 4* | 4* |
| Min Bottom Time | 80 min | 125 min | 120 min | 100 min |
| Min Run Time |
120 min | 180 min | 180 min | 180 min |
| Equipment Configuration Limitation |
3 cylinders 3 gases |
3 cylinders 3 gases |
Bailout Required |
3 cylinders 2 gases |
| Prerequisites (6) | CSU + 50 dives | TSD | SCR/CCR + TSD +pretest + 25 rebreather dives |
TSD |
| * - see the Instructor procedures for the specific dives |
| 1 - The deepest dive permitted during training |
| 2 - All least one training dive must meet this minimum |
| 3 - Other then the first evaluation dive no shallower dive may be credited toward certification |
| 4 - One deco cylinder must cover all stops and bailout |
| 5 - Includes all TMD info from L5 |
| 6 - Other prereq's may apply at instructor discretion |