30  m

40  m

40  m

40  m

100  m

10  m

10  m

40  m

40  m

60  m

N/A

N/A

30 min

as req'd

as req'd

N/A

N/A

1.6 pO₂

1.6 pO₂

1.6 pO₂

dives waived

dives waived

1.45 pO₂

1.45 pO₂

1.45 pO₂

dives waived

dives waived

3.6 pN₂

3.6 pN₂

3.6 pN₂

10 Hrs incl exams& evaluation

16 Hrs incl exams& evaluation

8 Hrs incl exams& evaluation

8 Hrs incl exams& evaluation

8 Hrs incl exams& evaluation

dives waived for this rating

4*

4*

4*

N/A

120 min

150 min

80 min

N/A

 180 min

240 min

240 min

CSU + AI or equivalent

CSU + OWI or equivalent

TSD+CSI + 100 dives + 10 deeper than 30m

ERD+TSI +150 dives +50 deco dives + 6 TSD courses

TMD+ERI +300 dives +100 deco dives + 6 ERD courses

* - see the diver rating for the specific procedures for the dives ......     
2 - other prerequisites may apply as per the conducting IT.     The bottom times listed are considered minimums.