Joshua Smith wrote:Like I said earlier in this thread- OC's advantage over CCR becomes apparent on dives deeper than 200'. Here's vplanner on a 300' dive. I probably used the wrong deco gasses, but I'm probably not too far off, either:
Dec to 200ft (4) Trimix 10/70 50ft/min descent.
Dec to 300ft (5) Trimix 10/70 60ft/min descent.
Level 300ft 14:20 (20) Trimix 10/70 1.01 ppO2, 51ft ead, 67ft end
Asc to 230ft (22) Trimix 10/70 -30ft/min ascent.
Stop at 230ft 0:40 (23) Trimix 10/70 0.80 ppO2, 34ft ead, 46ft end
Stop at 220ft 1:00 (24) Trimix 10/70 0.77 ppO2, 31ft ead, 43ft end
Stop at 210ft 1:00 (25) Trimix 10/70 0.74 ppO2, 28ft ead, 40ft end
Stop at 200ft 1:00 (26) Trimix 10/70 0.70 ppO2, 26ft ead, 37ft end
Stop at 190ft 1:00 (27) Trimix 20/25 1.35 ppO2, 122ft ead, 134ft end
Stop at 180ft 1:00 (28) Trimix 20/25 1.29 ppO2, 115ft ead, 127ft end
Stop at 170ft 1:00 (29) Trimix 20/25 1.23 ppO2, 108ft ead, 119ft end
Stop at 160ft 1:00 (30) Trimix 20/25 1.17 ppO2, 101ft ead, 112ft end
Stop at 150ft 1:00 (31) Trimix 20/25 1.11 ppO2, 94ft ead, 104ft end
Stop at 140ft 1:00 (32) Trimix 20/25 1.05 ppO2, 87ft ead, 97ft end
Stop at 130ft 1:00 (33) Trimix 20/25 0.99 ppO2, 80ft ead, 89ft end
Stop at 120ft 1:00 (34) Trimix 20/25 0.93 ppO2, 73ft ead, 82ft end
Stop at 110ft 2:00 (36) Trimix 20/25 0.87 ppO2, 67ft ead, 74ft end
Stop at 100ft 3:00 (39) Trimix 20/25 0.80 ppO2, 60ft ead, 67ft end
Stop at 90ft 2:00 (41) Nitrox 40 1.49 ppO2, 60ft ead
Stop at 80ft 3:00 (44) Nitrox 40 1.37 ppO2, 53ft ead
Stop at 70ft 3:00 (47) Nitrox 40 1.25 ppO2, 45ft ead
Stop at 60ft 4:00 (51) Nitrox 40 1.13 ppO2, 38ft ead
Stop at 50ft 6:00 (57) Nitrox 40 1.00 ppO2, 30ft ead
Stop at 40ft 7:00 (64) Nitrox 40 0.88 ppO2, 22ft ead
Stop at 30ft 11:00 (75) Nitrox 40 0.76 ppO2, 15ft ead
Stop at 20ft 35:00 (110) Oxygen 1.60 ppO2, 0ft ead
Surface (110) Oxygen -30ft/min ascent.
As you can see, it's giving 110 minutes run time.
Here's the same dive on CCR:
Dec to 200ft (4) Diluent 10/70
Dec to 300ft (5) Diluent 10/70
Level 300ft 14:20 (20) Diluent 10/70
Asc to 230ft (22) Diluent 10/70
Stop at 230ft 0:40 (23) Diluent 10/70
Stop at 220ft 1:00 (24) Diluent 10/70
Stop at 210ft 1:00 (25) Diluent 10/70
Stop at 200ft 1:00 (26) Diluent 10/70
Stop at 190ft 1:00 (27) Diluent 10/70
Stop at 180ft 1:00 (28) Diluent 10/70
Stop at 170ft 1:00 (29) Diluent 10/70
Stop at 160ft 1:00 (30) Diluent 10/70
Stop at 150ft 1:00 (31) Diluent 10/70
Stop at 140ft 1:00 (32) Diluent 10/70
Stop at 130ft 2:00 (34) Diluent 10/70
Stop at 120ft 2:00 (36) Diluent 10/70
Stop at 110ft 2:00 (38) Diluent 10/70
Stop at 100ft 3:00 (41) Diluent 10/70
Stop at 90ft 3:00 (44) Diluent 10/70
Stop at 80ft 4:00 (48) Diluent 10/70
Stop at 70ft 4:00 (52) Diluent 10/70
Stop at 60ft 6:00 (58) Diluent 10/70
Stop at 50ft 6:00 (64) Diluent 10/70
Stop at 40ft 8:00 (72) Diluent 10/70
Stop at 30ft 11:00 (83) Diluent 10/70
Stop at 20ft 42:00 (125) Diluent 10/70
Surface (125) Diluent 10/70
125 minutes > 100 minutes.
Josh what is your setpoint? something does not look right if you are getting that. are booth on nominal?
I would run 10/50 for this as you END would be 140' on that dive. I get this with nominal numbers for CCR.
DIVE PLAN
Surface interval = 1 day 0 hr 0 min.
Elevation = 0ft
Conservatism = Nominal
Dec to 200ft (3) Diluent 10/50 0.70 SetPoint, 60ft/min descent.
Dec to 300ft (4) Diluent 10/50 0.70 SetPoint, 80ft/min descent.
Level 300ft 15:25 (20) Diluent 10/50 1.30 SetPoint, 130ft ead, 139ft end
Asc to 220ft (22) Diluent 10/50 1.50 SetPoint, -30ft/min ascent.
Stop at 220ft 0:20 (23) Diluent 10/50 1.50 SetPoint, 82ft ead, 107ft end
Stop at 210ft 1:00 (24) Diluent 10/50 1.50 SetPoint, 76ft ead, 102ft end
Stop at 200ft 1:00 (25) Diluent 10/50 1.50 SetPoint, 71ft ead, 98ft end
Stop at 190ft 1:00 (26) Diluent 10/50 1.50 SetPoint, 65ft ead, 93ft end
Stop at 180ft 1:00 (27) Diluent 10/50 1.50 SetPoint, 59ft ead, 89ft end
Stop at 170ft 1:00 (28) Diluent 10/50 1.50 SetPoint, 54ft ead, 84ft end
Stop at 160ft 1:00 (29) Diluent 10/50 1.50 SetPoint, 48ft ead, 80ft end
Stop at 150ft 1:00 (30) Diluent 10/50 1.50 SetPoint, 42ft ead, 75ft end
Stop at 140ft 1:00 (31) Diluent 10/50 1.50 SetPoint, 37ft ead, 71ft end
Stop at 130ft 1:00 (32) Diluent 10/50 1.50 SetPoint, 31ft ead, 67ft end
Stop at 120ft 1:00 (33) Diluent 10/50 1.50 SetPoint, 26ft ead, 62ft end
Stop at 110ft 2:00 (35) Diluent 10/50 1.50 SetPoint, 20ft ead, 58ft end
Stop at 100ft 2:00 (37) Diluent 10/50 1.50 SetPoint, 14ft ead, 53ft end
Stop at 90ft 2:00 (39) Diluent 10/50 1.50 SetPoint, 9ft ead, 49ft end
Stop at 80ft 3:00 (42) Diluent 10/50 1.50 SetPoint, 3ft ead, 44ft end
Stop at 70ft 3:00 (45) Diluent 10/50 1.50 SetPoint, 0ft ead, 40ft end
Stop at 60ft 4:00 (49) Diluent 10/50 1.50 SetPoint, 0ft ead, 35ft end
Stop at 50ft 4:00 (53) Diluent 10/50 1.50 SetPoint, 0ft ead, 31ft end
Stop at 40ft 6:00 (59) Diluent 10/50 1.50 SetPoint, 0ft ead, 27ft end
Stop at 30ft 7:00 (66) Diluent 10/50 1.50 SetPoint, 0ft ead, 22ft end
Stop at 20ft 28:00 (94) Diluent 10/50 1.50 SetPoint, 0ft ead, 18ft end
Surface (94) Diluent 10/50 -30ft/min ascent.
Off gassing starts at 235.5ft
OTU's this dive: 158
CNS Total: 71.3%
----------------------
10/70 will give you about 103 min of run time at a 1.3 and a 1.5 for deco.
DIVE PLAN
Surface interval = 1 day 0 hr 0 min.
Elevation = 0ft
Conservatism = Nominal
Dec to 200ft (3) Diluent 10/70 0.70 SetPoint, 60ft/min descent.
Dec to 300ft (4) Diluent 10/70 0.70 SetPoint, 80ft/min descent.
Level 300ft 15:25 (20) Diluent 10/70 1.30 SetPoint, 49ft ead, 74ft end
Asc to 220ft (22) Diluent 10/70 1.50 SetPoint, -30ft/min ascent.
Stop at 220ft 0:20 (23) Diluent 10/70 1.50 SetPoint, 24ft ead, 61ft end
Stop at 210ft 1:00 (24) Diluent 10/70 1.50 SetPoint, 22ft ead, 59ft end
Stop at 200ft 1:00 (25) Diluent 10/70 1.50 SetPoint, 19ft ead, 57ft end
Stop at 190ft 1:00 (26) Diluent 10/70 1.50 SetPoint, 16ft ead, 55ft end
Stop at 180ft 1:00 (27) Diluent 10/70 1.50 SetPoint, 13ft ead, 52ft end
Stop at 170ft 1:00 (28) Diluent 10/70 1.50 SetPoint, 10ft ead, 50ft end
Stop at 160ft 1:00 (29) Diluent 10/70 1.50 SetPoint, 7ft ead, 48ft end
Stop at 150ft 1:00 (30) Diluent 10/70 1.50 SetPoint, 5ft ead, 46ft end
Stop at 140ft 1:00 (31) Diluent 10/70 1.50 SetPoint, 2ft ead, 43ft end
Stop at 130ft 1:00 (32) Diluent 10/70 1.50 SetPoint, 0ft ead, 41ft end
Stop at 120ft 2:00 (34) Diluent 10/70 1.50 SetPoint, 0ft ead, 39ft end
Stop at 110ft 2:00 (36) Diluent 10/70 1.50 SetPoint, 0ft ead, 37ft end
Stop at 100ft 2:00 (38) Diluent 10/70 1.50 SetPoint, 0ft ead, 35ft end
Stop at 90ft 3:00 (41) Diluent 10/70 1.50 SetPoint, 0ft ead, 32ft end
Stop at 80ft 3:00 (44) Diluent 10/70 1.50 SetPoint, 0ft ead, 30ft end
Stop at 70ft 3:00 (47) Diluent 10/70 1.50 SetPoint, 0ft ead, 28ft end
Stop at 60ft 4:00 (51) Diluent 10/70 1.50 SetPoint, 0ft ead, 26ft end
Stop at 50ft 6:00 (57) Diluent 10/70 1.50 SetPoint, 0ft ead, 23ft end
Stop at 40ft 6:00 (63) Diluent 10/70 1.50 SetPoint, 0ft ead, 21ft end
Stop at 30ft 9:00 (72) Diluent 10/70 1.50 SetPoint, 0ft ead, 19ft end
Stop at 20ft 31:00 (103) Diluent 10/70 1.50 SetPoint, 0ft ead, 17ft end
Surface (103) Diluent 10/70 -30ft/min ascent.
Off gassing starts at 237.8ft
OTU's this dive: 174
CNS Total: 78.7%