I haven’t had one yet ! but then again, Im anal when it comes to diving and safety... I believe in SELF RELIANCE way too much.. buddys are a good thing,, but it is up to YOU to be self preservence in every respect,, I firmly believe that when you put your life in someone else’s hands, that you will be disappointed.. I love me, way to much for that !buddys are a back up,, not a reliance !!!