The majority of field research outlined on this site has been conducted using technological advances in closed circuit rebreather (CCR) diving. There are a number of advantages for utilising CCR. These include:

  • Dynamic breathing gas mixture
  • Minimizes non-oxygen fraction
  • Minimizes decompression obligation
  • Gas efficiency
  • Increased bottom time
  • Silent operations



Numerous rebreathers are now available. It is up to the individual to seek guidance and support before making an informed decision on which system to use. Ultimately, this is your life support and it is strongly suggested not to select a unit based on who is using it and how cheap/free parts can be obtained - a fatal pitfall. If you have any queries with regard to CCR's please read the recommended publications below and/or contact me and I will ensure that you get the guidance that you are looking for. 



ROVs_WEBSITE.jpgROVs Okeanos Explorer


fig_2_dtisanatomy.jpgFigure 3. Deep Towed Imaging System (DTIS) developed by National Institute (NIWA) scientists. Image courtesy of NIWA.

Welcome. This page is currently in progress and will be completed by the end of December 2021.  Please feel free to contact me with any questions, otherwise relevant publications can be found below. Thank you for your patience and please return for updates soon. 


Useful Publications

Rowley MR. 2018. In the mix: Closed circuit rebreather gas planning part II. BSAC SCUBA. Link

Rowley MR. 2017. In the mix: Closed circuit rebreather gas planning part I. BSAC SCUBA. 54-57 Link

Rowley MR. 2016. In the mix Closing the loop. BSAC SCUBA. 42-44 Link

Rowley MR. 2016. In the mix: Closing the loop part V: The scrubber. BSAC SCUBA. 48-51 Link

Rowley MR. 2016. Learning Curve: First steps to CCR. BSAC SCUBA. 44-50 Link