I thought I would give a bit better perspective for the piracy activity in the Gulf of Aden and the Indian Ocean. Most of the piracy maps we see are very cluttered, and really make no sense of the activity. Below, I have a picture of the Indian Ocean and Gulf of Aden region, that shows a pattern of "clusters" that we have identified.
I must state here, that attacks do in deed take place outside of the marked clusters, however, there is a distinctive cluster pattern that has developed. That being said, any transits North and West of the green line should be considered at risk for attack.
This information thanks to:
Evolutionary Security Management, Inc