The factors that affect battery life on the Shearwater Perdix and Petrel dive computers are, in order of most to least significant: Battery Type D...

I’ve been asked in private communication if I would use 40/70 for all of my technical diving. I thought it might be worthwhile for me to talk about journey.

A CCR diver often has multiple gasses available, any of which could in theory be used for calibrating the O2 sensors in the CCR. The simple answer is that pure O2 is the best gas for a calibration source, read on to find out why.

At Shearwater, we place a high value in the work being done by the scientific community relating to diving and decompression theory. We do our best...

Reviewed in 2025. For many years it has been common practice for rebreather divers to start breathing from their rebreather prior to the dive. Ther...

We were very busy at Shearwater during the month of March. We managed to trot around the globe to 3 different trade shows: OZTek Dive Conference & Exhibition, Dive Resort Travel Shanghai, and Beneath the Sea.

The question of what CNS oxygen exposure is safe can spark heated debate among technical divers. This reflects the seriousness of CNS oxygen toxicity when diving. This article sidesteps that debate, and focuses solely on how Shearwater dive computers calculate the CNS value. 

We're often asked about how we got started in the dive computer business. This short video production shares a little background about our founders and our company's vision.

Firmware updates are an essential way to add value to the products that we create. It enables us to fix bugs, add new features, and keep our produc...