Question 312General Subjects - 1st Asst/Chief

The correct answer is D) Baseline thermography. Baseline thermography refers to the initial thermographic analysis performed on new equipment to establish a baseline or reference thermal signature. This baseline data can then be used for comparison to the thermal signature of the same equipment at a later date, allowing for the detection of any changes or anomalies that may indicate potential issues or degradation. The other options are incorrect: Thermal trending refers to monitoring changes in thermal signatures over time, spectral thermography involves analyzing the infrared spectrum, and comparative thermography compares the thermal signatures of different equipment or components, rather than establishing a baseline for the same equipment.