This paper discusses initial development of Virtual Environment Training Technologies (VETT) to facilitate knowledge elicitation, task analysis, and performance measure development for naval training. Primary components included on-going hardware and software development in the VETT test-bed, iterative prototyping capabilities, and flexible performance recording and review capabilities. The customer for this effort, the Surface Warfare Officers' School (SWOS), envisions the use of virtual environments to train "seaman's eye," an expert perceptual technique currently learned through extensive apprenticeship training. The chosen target task for the R&D process was Underway Replenishment (UNREP). The process began with the use of standard Knowledge Elicitation (KE) techniques (e.g., document reviews and interviews) to obtain an UNREP task description. This description was then used to develop a prototype simulation and a generic UNREP scenario on the VETT test-bed. Subject matter experts included Merchant Marine harbor pilots, visiting line Surface Warfare Officers (SWOs), and in-house expert reservists. The SWOs performed the simulated UNREP scenario while video was recorded from their viewpoint (i.e., first-person perspective). The videos provided further KE capability by permitting SWOs to explain what they did and why they did it in a context-specific manner during a debrief session. This arrangement produced more elaborate explanations than the initial interviews, apparently because it reminded the experts of subtle, nonverbal cues used to perform UNREP. The context-specific interviews stimulated more detailed discussions of the validity of the simulation and potential performance measures. Based on initial analysis, the prototype was taken to SWOS for a simulation validity experiment. Progressive refinements will be described and the results of a simulation validation experiment will be presented.