IEEE-1451[1] and OGC Sensor Web Enablement (OGC SWE)[2] define standardprotocols to operate instruments, including methods to calibrate, configure,trigger data acquisition, and retrieve instrument data based on specified temporaland geospatial criteria. These standards also provide standard ways to describe instrumentcapabilities, properties, and data structures produced by the instrument.These standard operational protocols and descriptions enable observing systems tomanage very diverse instruments as well as to acquire, process, and interpret theirdata in a uniform and automated manner. We refer to this property as “instrumentinteroperability”. This paper describes integration and evaluation of MBARI PUCKprotocol [3] within different observatories including OBSEA [4,5] in Spain, the ESONETtest-bed in Germany, and the SmartBay observatory in Canada.