DIVING MATH QUICK REFERENCE
FFW	FSW	ATA	PSIA	VOLUME	PPO2	PPN2	FPO2	FPN2
0	0	1	14.7	10.00	3.08	11.48	0.2095	0.7808
34	33	2	29.4	5.00	6.16	22.96	0.4	1.6
68	44	3	44.1	2.14	9.24	34.43	0.6	2.3
102	99	4	58.8	0.54	12.32	45.91	0.8	3.1
136	132	5	73.5	0.11	15.40	57.39	1.0	3.9
170	165	6	88.2	0.02	18.48	68.87	1.3	4.7
204	198	7	102.9	0.00	21.56	80.34	1.5	5.5
238	231	8	117.6	0.00	24.64	91.82	1.7	6.2
272	264	9	132.3	0.00	27.72	103.30	1.9	7.0
306	297	10	147	0.00	30.80	114.78	2.1	7.8
34 * (ATA -1)	33 * (ATA -1)	(DEPTH/33)+1	14.7*ATA				.2095*ATA	.7808*ATA
NOTE: All Examples use FSW (33) for calculations. You may modify values  under "VARIABLES"
to make changes to some of the examples.
FFW	14.7/34
(Pressure)	0.432
FSW	14.7/33
(Pressure)	0.445
ATA	(DEPTH/33)+1
	3.27	ATA @	75	Feet
VOLUME	1) ((DEPTH/33)+1)*VOLUME
	2) (SURFACE_VOLUME/((NEW_DEPTH/33)+1))
Surface Volume	49.09
Depth Volume	21.89
PPO2	((.445*DEPTH)+14.7)*.2095
	10.08	@	75	Feet
PPN2	((.445*DEPTH)+14.7)*.7808
	37.56	@	75	Feet
PSIA	14.7*ATA
	48.11
VARIABLES
DEPTH	75
VOLUME	15
NEW DEPTH	41
Jim Radford	6-Dec-2000		www.jimradford.com/projects/diving