In extreme situations such as underwater environments, conflict zones or space, human senses are often limited, which can negatively affect performance and perception. Our current paper investigates how audiovisual augmentations can help to overcome these limitations. As part of the study, a virtual simulation of a space mission on the International Space Station (ISS) was developed. 43 participants performed maintenance tasks under four conditions: without assistance, with audiovisual cues, with visual cues only or with auditory cues only. The results show: Audiovisual augmentations led to 60% faster task completion, significantly reduced perceived workload and increased the feeling of presence in the environment. These results underline the potential of audiovisual technologies to effectively support people in environments with impaired perception - a promising approach for applications in challenging and hostile environments. A link to the publication can be found here: https://ieeexplore.ieee.org/document/10765474