The site Information Dissemination has a post Swarm Tactics with some photos from a Sina article: 50 pirate vessels driven out by Chinese naval fleet
I don't agree with the original captions from Sina or the comments at I.D. I have put the original captions at the top of each photo and my own captions at the bottom in bold.
About 50 suspected pirate vessels approach a ship escorted by the Chinese naval fleet in the Gulf of Aden, Feb. 25, 2010. The vessels harassed the 31 Chinese and foreign ships that the naval fleet was escorting. They were driven out soon after the fleet dispatched vessels and helicopters. (Xinhua Photo)
I began routinely making transits through the GoA in 1999, before pirates became a problem, it wasn't uncommon to see fisherman acting the way they are shown in the photo above.
Next photo from the same post.
A suspected pirate vessel is driven out by the Chinese naval fleet in the Gulf of Aden, February 25, 2010. (Xinhua Photo)
Regarding the use of large outboard engines on fishing skiffs, it is sometimes asserted that fisherman have no need for such powerful engines on their skiff but in fact it is a long standing practice, in place prior to the piracy problem in the area:
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