Way I see it is Dm and training agency had absolutely no other responsibility to this certified diver. The certified diver should know that in the case of a computer failure to end the dive immediately, its taught in a ow class and in the video and reading materials to plan your dive and dive your plan.Does not matter if you plan the dive via tables or computer.you are only responsible for yourself..Dm is there to guide a dive. Thats it..Unless you hire and pay a Dm to dive with you personally the DM leading a dive is blameless here.
As to the Dm diving a more aggressive profile, did he/she really or did he/she use nitrox that the op may not have ben using? Was the OP tagging along with the DM thinking it was ok to follow the DM even with a malfunctioning computer? Because of this I always discourage people from renting a computer as they never know when the last time a battery was changed or even get to read a manual on how to use it. Its a universal problem with renting any equipment, anywhere.
As to the Dm diving a more aggressive profile, did he/she really or did he/she use nitrox that the op may not have ben using? Was the OP tagging along with the DM thinking it was ok to follow the DM even with a malfunctioning computer? Because of this I always discourage people from renting a computer as they never know when the last time a battery was changed or even get to read a manual on how to use it. Its a universal problem with renting any equipment, anywhere.