Sir, the scorpion is designed the search special objects and or enormities, it is not a naval equipment, so there has to be difference in both styles, sir, this is for readeCh but submarine is for speed and stealthiness.If you say so. I'm not a naval engineer but looking at similar western versions, these are more dynamically designed. Below is super scorpio which both US and Royal navies use for similar purposes:
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Here is a presentation regarding Underwater UAVs and their use for anyone interested.