There is no minimum interval. A dive directly from 70 fsw for 29 minuts can immediately be followed to a dive to 50 fsw for 39 mins, and would be classed as a "Combined Dive"
To calculate decompression from this Combined Dive, is by taking the depest depth, (70 fsw), and total time (68 mins), and decompress on an appropriate table.
Using the USN repetitive dive times, this varies on the residual nitrogen remaining in solution.
the padi site will take 0:04 00:04 0:00 or 00:00 the answer is 00:04 or at least that is what i put :)
Q
00:04 ~your welcome :/
the answer is 00:28
0:04
1 hour and 45 minutes
00:04 ~your welcome :/
2 hours 29minutes
k
0:04
The address of the Surface Interval is: 121 Liston Road - Otway, Beaufort, NC 28516-7270
it just depends what side you are on... say like if you were on the side facing the sun you could burn in a minimum of 2 minutes. and if you were at the other side you could freeze in a minimum of 6 minutes. and if you were in the middle you could get poisoned because whatever side you are on the sun can poison you because it is a chemical reaction
Minimum is an empty word in these circumstances, but bikes has quite little surface contact due to their narrow tires.