Thank you for your feedback. When casting a FishSpy, the signal will be lost, due to speed it travels through the air and from impacting the water. It is just a case of reconnecting with the camera once it has settled in the water. You may need to allow a few moments for it to re-connect, depending on conditions. For more information on this please visit www.fishspy.com where there are several tutorial videos, blog posts and also a very useful FAQ page: http://www.fishspy.com/support. Should this not be of help, we can arrange a technical advisor to call you and talk you through it.