175.115—Exceptions.
         The following persons need not comply with  § 175.110; however, each must carry on board visual distress signals suitable for night use, selected from the list in  § 175.130 or  § 175.135, in the number required, between sunset and sunrise:
    
    
    
    
        
        (c) 
         A person using a sailboat of completely open construction, not equipped with propulsion machinery, under 26′ in length.