173.55—Report of casualty or accident.
        
        (a) 
         The operator of a vessel shall submit the casualty or accident report prescribed in  § 173.57 to the reporting authority prescribed in  § 173.59 when, as a result of an occurrence that involves the vessel or its equipment:
    
    
    
    
        
        (3) 
         Damage to vessels and other property totals $2,000 or more or there is a complete loss of any vessel;
    
    
    
    
    
        
        (2) 
         Within 48 hours of the occurrence if a person is injured and requires medical treatment beyond first aid, or disappears from a vessel; and
    
    
        
        (3) 
         Within 10 days of the occurrence or death if an earlier report is not required by this paragraph.
    
    
        
        (c) 
         When the operator of a vessel cannot submit the casualty or accident report required by paragraph (a) of this section, the owner shall submit the casualty or accident report.