Raymarine 5M Backbone Cable f/SeaTalkng Description Backbone Cables In a SeaTalkng installation, a backbone cable runs through the length of the boat. Individual devices connect to the backbone by spur cables that run to T-pieces on the backbone. The backbone carries both data and power to 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 can be joined together by part A06030, a backbone extender. Shipping Information Every product is packaged carefully for safe travel. A tracking number will be provided to you as soon as your order ships. This product ships from the United States and will either be sent UPS, FedEX and/or USPS Priority for a quick delivery. Track Page Views With Auctiva's Counter