OSTC 4 broken – the 1st time
I was ascending from a 50 meters dive to my first decompression stop @ 21 meters. I switched to my decompression gas and tried to change my gas setting also on the OSTC 4.
All of a sudden I wasn’t able, because the right button stopped working. Unfortunately this is the confirmation button.
To make a long story short: this is the reason why we always have a 2nd diving computer as a backup with us. This backup computer (OSTC 2) was already set to the needed gases and I was able to switch to my decompression gas to continue my dive.