Okay, so you are in the top-5 with your design and we're trying to narrow it down. We like the "F" and lower case "a" in the wave, too.
(1) Can you make a variation of the logo with a dark gray and/or black on the top (representing space) and blue on the bottom (representing underwater.)
(2) Can you make a variation of the logo using the wave in the middle, instead of the lines.
We very much like the red in the logo (because it represents the safety and rescue aspect of the company), but we wanted to see the other colors attempted.