Boat & yacht bilge odors are easily taken care of with a Crystal Air ozone generator & C20 liquid deodorizer. Just place ozone generator in bilge or living quarters when at dock and operate on full for 24 hrs. Ensure that all plants pets and people are removed for the duration of the deodorization process. Air out the living quarters of the boat or yacht before re entering. For heavy boat & yacht bilge odors use C20 liquid deodorizer prior to ozone application.