The NOXX BOXX is used to place the emitters where there is no inboard surface on which to attach the emitters. For example the NOXX BOXX can be submerged between two outboard motors to keep the props and legs free of fouling. They can be submerged under the actual marina docks to keep the wooden docks fouling free. Anywhere where there is a fouling problem that does not have an ideal surface to attach emitters. The frequency emitted from the NOXX BOXX will deter larvae for a 6ft radius from each NOXX BOXX.