An OC/T (Observer / Controller-Trainer) is the field role that captures observation at the point of execution and converts it to score against a published rubric. The role exists across high-consequence domains under different names: preceptor in healthcare, training officer in fire and EMS, examiner in critical-infrastructure operations.
In OCTAAR the OC/T is a first-class user. Capture is offline-tolerant. Scoring is rubric-driven. Calibration of the role is continuous, not periodic.