Based on the above, we investigated applications that could be used for each scenario mentioned and serve as a starting point for selecting the "ideal software" for the company's operations and its financial and operational resources. In addition, we sought information on the ergonomics of the applications mentioned, considering this an essential factor for the comfort and effectiveness of the data fusion specialists operating them. Regarding this last point, it must be considered that an application with better ergonomics than others can ultimately prove to be more efficient, even if its technical performance is not the best. This is why, similar to other specialised applications used on computers, operators often request to use applications they are comfortable with. Note that applications that can do everything in one click are rare; therefore, it is often necessary to fuse laser and photogrammetry data first before operating them with CAD software. For convenience, each application is classified according to its purpose (so the technical possibilities it offers) and grouped according to the scenarios mentioned above. However, scenarios #1 & #2 have been kept in the same table because they involve investigating underwater structures or wreckage, and we can consider that reverse-engineering software can also be used for normal inspection. Applications that can be used for Scenario #3 are separated because bathymetry is usually specific. To make the reading as simple as possible, the following terminologies are used. • "Fusing"; which means combining the source datasets as defined above • "Overlaying"; which means placing the fused data on top of the CAD drawing or an existing map for comparison and visual reference. • "Used for reverse engineering" for the applications that can be used for this purpose. Regarding minimum hardware requirements, the specifications for Central Processing Units (CPUs) and Graphics Processing Units (GPUs) can be difficult to interpret for those unfamiliar with computer design. For clarity, examples are provided, tied to the performance levels referenced by the editors. While other models exist beyond those listed, these examples are grouped into the following hardware-performance tiers: • Entry-Level: Standard office or engineering machines. Suitable for small datasets, visualization, and basic photogrammetry. • Mid-Level: Powerful engineering workstations. Capable of handling medium datasets, CAD integration, and moderate reverse engineering. • High-Level: Advanced engineering workstations. Required for large point clouds, complex CAD, and enterprise GIS (Geographic Information System). • Workstation (Very High Performance): Professional-grade systems for simulation, enterprise CAD, and proprietary sonar/laser systems. Random Access Memory (RAM) and disk space required to run each software application are also listed. However, note that effective use typically demands more than the minimums mentioned. Ergonomics are classified as below: • Level 1: Intuitive / Straightforward (can be used without specific training by people accustomed to computers) • Level 2: Moderate / Intermediate (May require support for some functions) • Level 3: Complex / Advanced (requires specialized training) • Level 4: Expert / Highly Complex (requires specialized training and operator certification). Please note that we have no commercial ties with the software editors mentioned (this website is fully independent and non-profit) and do not claim that the list provided covers all offerings in this industry, which is impossible given that new products are regularly released and we may have missed several publishers. Therefore, the information in this article is provided for informational purposes only, to spark interest in the technology described.