A friend of mine just bought one and have a question as it is unclear in the manual. The manual stated that the dept gauge range is 0-99m. On one page there is a message that it should not be used to dive below 40m. There is no maximum depth specification anywhere in the manual. I am not sure if the 40m is the actual rated depth for the computer or Uwatec just does not recommend diving below 40m as the Sport Plus is for leisure dive only. Thanks for any info.