Raymarine SeaTalkng 20M Backbone Cable Brand New Includes Manufacturer's Warranty Product # A06037 The Raymarine A06037 is a SeaTalkng 20 meter backbone cable with a plug at both ends. Backbone cable runs through the length of the boat. It connects to the backbone by spur cables that run to T-pieces on the backbone and carries data and power to the attached devices. The backbone should be sized so that it will run past every location where an NG or NMEA 2000 device might be installed. Two backbone cable lengths are joined together by part A06030,a backbone extender. A06037 Features SeaTalkng Backbone Cable 20m Cable Length Runs Through the Length of Boat Devices Connect to Backbone by Spur Cables Carries Data Power to Attached Devices Backbone Extender