In 2151, Enterprise NX-01 conducted a spectral analysis of fragments of the warp trail of a Suliban cell ship. (ENT: "Broken Bow") In 2154, Enterprise deduced that a debris cloud existed around a planet by creating a spectrographic analysis. Such an analysis was also used for detecting Klingon alloy as part of the hull plating. (ENT: "Observer Effect") In 2266, a distant spectrograph on aboard the Enterprise detected the metallic signature of the Fesarius as it approached the Federation ship. (TOS: "The Corbomite Maneuver" )