Do you have an Oceanic Data
Max Pro computer? If so, our
advice is to upgrade or replace it.
Each month, Undercurrent sends
  out an informative e-mail to more than 10,000 divers (sign up at www.undercurrent.org/) and we asked them to report any
  problems with computers they have had.
 Of the forty divers who responded, most all problems were random
  and no significant problems could be associated with any
  brand with one glaring exception.
Several divers reported failures with the Datamax Pro air-integrated
  Oceanic model, and its successor, the Datamax Pro Plus.
  In one case, a Data Max Pro’s low battery indicator started flashing
  though the battery had just been changed. In another
  Datamax Pro failure, the pressure indicator began to show
  decreasing values. One Pro Plus failed to even power up. Another
  time, the Sherwood version of the Datamax (made by Pelagic,
  which manufactures Oceanic, Sherwood and many other brands
  of computers) suddenly began providing only depth and time
  readouts. Commonly, the owners reported that they could return
  the damaged units for repairs or rebuilt replacements. Yet that
  was after poor technology had compromised their diving safety.
 We called Oceanic tech rep Ron Lendess, who explained that
  the Datamax Pro was discontinued in 2000. It was replaced by the
  Pro Plus, which debuted in 1999. According to Lendess, Oceanic
  will continue to service the Datamax Pro until 2010 and offers an
  upgrade program that allows Oceanic owners to “trade in” an old
  computer for a newer model, at a discount off retail price. The
  current retail list price on the hose mounted Pro Plus is $899, but
  the upgrade price is $540.