In this paper, we present an approach to managing situated knowledge, i.e., knowledge specific to a particular location, for complex instruments. Our research is driven by real needs in the scientific instrumentation field. Although many works propose a solution for real-world annotation, those approaches might not provide the user with an effective means for representing or expressing knowledge about a complex device due to the limitation set by text note and predefined structures. With the aim of representing more elaborated situated knowledge an extended version of Spatial Knowledge Quantum is defined. The objective is to bring the possibility of enhancing the real-world with arbitrary 3D shapes. Two different interfaces for manipulating knowledge are proposed, one is based on Augmented Reality, while the second relies on Augmented Virtuality to build a virtual environment. This latter interface can be produced and distributed without extra costs, and consequently, allows knowledge dissemination at a larger scale. A preliminary version of our framework has been implemented and deployed in customers’ environments.