Standing in race corrals awaiting marathon start, and constantly prompted by other runners' HR straps trying to connect to my 255. There used to be a manual option only to add new sensors in previous Forerunners, and that is how the menu is set up it seems on the 255. But is it now only automatic identification with prompt to connect now? Of course, I can decline the connection but it's distracting prior to race start as it takes over the display until I reject the connection. Happened 2 or 3 times while waiting to start.