What is the primary purpose of the diamond shape displayed by a partly submerged object being towed?

The primary purpose of the diamond shape displayed by a partly submerged object being towed is to indicate presence. This marking serves as a visual cue to other vessels and mariners that there is an object in the water that may not be immediately visible or may pose a hazard to navigation. The diamond shape is a recognized signaling symbol that alerts others to the situation, allowing them to take appropriate action to avoid potential collisions or accidents. Proper signaling is crucial for ensuring safe navigation and awareness of submerged or partially submerged objects in the water, which is particularly important in busy or narrow waterways where visibility may be limited.