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Depth
NDL
feet (m)
hours:mins
30 (9)
4:20 (4:43)
40 (12)
2:17 (2:24)
50 (15)
1:21 (1:25)
60 (18)
:57 (:59)
70 (21)
:40 (:41)
80 (24)
:30 (:32)
90 (27)
:24 (:25)
100 (30) :19 (:20)
110 (33) :16 (:17)
120 (36) :13 (:14)
130 (39) :11 (:11)
140 (42) :09 (:09)
150 (45) :08 (:08)
160 (48) :07 (:07)
170 (51) :07 (:06)
180 (54) :06 (:06)
190 (57) :05 (:05)
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