Raymarine SeaTalkng 3M Spur Cable Brand New Includes Manufacturer's Warranty Product # A06040 The Raymarine A06040 is a 3 meter spur cable for SeatTalkng with a plug at both ends. Backbone cable runs through the length of the boat. It connects to 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 is joined together by a backbone extender. A06040 Features SeatTalkng Spur Cable 3m Cable Length Runs Through the Length of Boat Devices Connect to Backbone by Spur Cables Carries Data Power to Attached Devices Backbone Extender