Krzysztof Starnawski
Krzysztof Starnawski (born 1968) is a Polish technical and cave diver and International Association of Nitrox and Technical Divers (IANTD), Confédération Mondiale des Activités Subaquatiques (CMAS), French Federation of Speleology (FFS) diving instructor. Dive records 
All achieved with "Dual HammerHead" rebreathers of his own design. Open water
  on 10 September 2018 in Lake Garda, Italy. on 3 December 2011 in Dahab, Egypt (dive time 9 hours). Karst springs
  on 23 July 2016 in Lake Viroit (), Albania. on 21 August 2015 in Hranice Abyss, Czech Republic. See also 
 Deep diving
 Cave diving
 Technical diving

References 

1968 births
Living people
Cave diving explorers
Place of birth missing (living people)
Polish explorers
Polish underwater divers