Definition of a Black Box unit

​The term Black Box indicates that the monitor or display portion of the system is selected and supplied by the customer, rather than being included as part of the Furuno system. Furuno has a variety of Black Box products including radar, sonar, fishfinders, etc. The Black Box technology offers greater flexibility in meeting your installation and space requirements. 
 
Note: Furuno usually denotes Black Box versions by including "BB" in the model number.