I think it's a very sensible idea, and clearly so does at least one source from the Royal Navy
He said: "Though we have made it more difficult for pirates, we would encourage any ship to have means to defend themselves within the law.
"A layered system of defence is a good idea.
"There are a lot of new ideas coming on the market and a non lethal system probably has its place.
This suggests that the machine is within the law, and I doubt very much that any coastguard boat in that area is going to make problems with having this on board whilst in the Indian Ocean
and Red Sea. The problems might occur if it were mounted on the bow whilst sailing into Portsmouth, say. No probs for the big tankers, I'm sure they have plenty of storage
space. As for the little ones... well perhaps some hopeful entrepreneur could set up rental agencies in India