A Wave is symbolized as one of the strongest forces on earth (Strength). also if you read more into it, its about faith, a wave is you against mother nature, you cannot control it, you just have to put your faith into her.
Arrow Tattoo: An arrow can only be shot by pulling it backward. So when life is dragging you back with difficulties, it means that it’s going to launch you into something great. So focus, and keep aiming.