I have a Viper Air with transmitter and never had a sync problem underwater. Occasionally it will not synch, but then I just have to to run the pairing option on the Viper and it works every time.
These days I'm just using my Viper for a bottom timer, but I still use the transmitter to determine my SAC rates. It's interesting to see how my SAC rates change depending on water temp and dive objectives. I also like to be able to look at my dive profile to see how accurate I am with depth on deco stops.
These days I'm just using my Viper for a bottom timer, but I still use the transmitter to determine my SAC rates. It's interesting to see how my SAC rates change depending on water temp and dive objectives. I also like to be able to look at my dive profile to see how accurate I am with depth on deco stops.