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THEORETICAL DIVE DEPTH (msw) AT VARIOUS ALTITUDES (in meters)
Sea Level	300	600	900	1200	1500	1800	2100	2400	2700	3000
0	0	0	0	0	0	0	0	0	0	0
2	2	2	2	2	2	2	3	3	3	3
4	4	4	4	5	5	5	5	5	6	6
6	6	6	7	7	7	7	8	8	8	9
8	8	9	9	9	10	10	10	11	11	12
10	10	11	11	12	12	12	13	13	14	14
12	12	13	13	14	14	15	15	16	17	17
14	15	15	16	16	17	17	18	19	19	20
16	17	17	18	18	19	20	21	21	22	23
18	19	19	20	21	22	22	23	24	25	26
20	21	21	22	23	24	25	26	27	28	29
22	23	24	25	25	26	27	28	29	31	32
24	25	26	27	28	29	30	31	32	33	35
26	27	28	29	30	31	32	34	35	36	38
28	29	30	31	32	34	35	36	38	39	40
30	31	32	33	35	36	37	39	40	42	43
32	33	34	36	37	38	40	41	43	45	46
34	35	37	38	39	41	42	44	46	47	49
36	37	39	40	42	43	45	46	48	50	52
38	39	41	42	44	46	47	49	51	53	55
40	41	43	45	46	48	50	52	54	56	58
The Imperial version of the E.R. Cross Conversion Table for High Altitude Diving appeared in Skin Diver magazine 1970 It is based on an approximate 4% correction per 300 meter altitude

THEORETICAL SAFETY STOPS (msw) AT VARIOUS ALTITUDES (in meters)
Sea Level	300	600	900	1200	1500	1800	2100	2400	2700	3000
4.8	4.6	4.5	4.3	4.2	4.0	3.9	3.7	3.6	3.4	3.3

Please Review the Rules for Diving After Arriving at Altitude Remember the Rules for Travel to Altitude After Diving
Santa Rosa, NM 4,762´	Heron Lake, NM 7,157´	Clines Corners, NM 7,250´	Balmorhea, TX 3,205´	Twin Lakes, CO 9,200´	Raton Pass, NM 7,834´
Atmospheric pressure at 5,000 feet is approximately 850 mb and at 10,000 feet it is approximately 700 mb

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