I'm new here and have been reading for quite some time. Fish quite a bit but just upgraded boat and electronics. Was wondering if it was okay to turn the Helix 9/10 units on out of the water to adjust settings, color palette, etc...? In other words, can I take my time an do in the garage or should the transducers be submerged before powering the units up? I have heard it both ways so I thought I would register and ask the experts. Thanks in advance.