A node is a section of a platform that contains one or more computers and power converters. Instruments on a platform are plugged into a node, which collects the instrument data internally and/or transmit the data externally. Some platforms contain a single node, like a glider. Other platforms have several nodes wired together. For example, a mooring that hosts a surface buoy, near-surface instrument frame, and seafloor multi-function node, each with a different set of instruments attached.

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