Information integration for explicit comprehension can be highly challenging in a large-scale system with interconnected equipment under the influence of the environment. This presents a great challenge in acquiring and maintaining situation awareness during the transition from traditional to remote and, eventually, to autonomous operation. However, the maritime industry appears to approach situation awareness in a highly restricted manner that focuses on visual and navigational awareness only, resulting in no support system for engine room monitoring. This research conducted a goal-directed task analysis with thirty-one subject matter experts, with an average sea experience of 9.78 years, to investigate situation awareness in the engine room. As a result, the situation awareness information requirements for nine machineries and twelve systems are developed. The findings reveal that numerous perception elements, and their complex combinations, for higher-level awareness comprise situation awareness, and situation awareness deterioration is highly likely, due to the replication or reproduction of ship sense and expanded system coverage to compensate for the lack of marine engineers on ships. This research proposes that presenting higher-level situation awareness information in consideration of schema instantiation could be a promising alternative to developing and optimising the situation awareness support system for engine room monitoring at the future shore control center. Highlights The replication of conventional monitoring systems for remote operation results in a loss of situation awareness information as the conventional systems are designed to collaborate with human operators onsite The relocation of humans from ships to shore must incorporate the transfer of information that human operators generate Situation awareness in the engine room comprises numerous information elements and requires a high level of information integration skills for comprehension and projection Situation awareness support systems must facilitate information integration while maintaining a balance between system explainability and simplicity Cue strength differences in comprising comprehension and projection might effectively address system complexity and situation awareness