Most modern deco approaches include some form of deep stop. Suunto and Uwatec are starting to introduce them into their dive computers. Many agencies are also accepting that they are a good thing and DAN recently published some research in support of deep stops.
Pyle stops are the easiest way to incorporate deep stops into your diving.
1) Calculate a decompression profile for the dive you wish to do, using whatever software you normally use.
2) Take the distance between the bottom portion of the dive (at the time you begin your ascent) and the first "required" decompression stop, and find the midpoint. You can use the ambient pressure midpoint if you want, but for most dives in the "technical" diving range, the linear distance midpoint will be close enough and is easier to calculate. This depth will be your first deep safety stop, and the stop should be about 2-3 minutes in duration.
3) Re-calculate the decompression profile by including the deep safety stop in the profile (most software will allow for multi-level profile calculations).
4) If the distance between your first deep safety stop and your first "required" stop is greater than 10 m, then add a second deep safety stop at the midpoint between the first deep safety stop and the first required stop.
5) Repeat as necessary until there is less than 10 m between your last deep safety stop and the first required safety stop.
For a good explanation of why deep stops are a good things then take a look at the following link.
http://www.dive-tech.co.uk/resources/deepstops.pdf
and if you want to find out more about decompression theory (or send along your regional coach) then you might want to take a look at the following post.
http://www.yorkshire-divers.co.uk/fo...ad.php?t=11094