Probably on TV around 1976 - 1979. What I recall: A anime style (probably was made in Japan) animation. Takes place in space. The spaceship was huge ocean type battleship with gun turrets on top. On the front of the ship was a huge laser gun. I remember a scene where some of the crew was standing in this laser gun they were dwarfed by its size. Also, I recall something about "wave motion", whatever that was. These are some good clues. For the life of me, I can't remember what it was called. Any information would be greatly appreciated.