That is an interesting map!
Unfortunately it hasn't been updated since 2008 and the additional piracy
areas added. But theres still interesting information: For example Al Mukalla in Yemen which this map says:
Al Mukallah, Yemen. Possible port for "Somali pirate" mothership re-supply. Closest port to the Gulf of Aden Pirate Zone. Most convenient place from which to launch attacks on the major shipping lane joining Asia and Southern Africa with Europe. Fast open boats attached to the motherships can dock here and easily blend in with the local fishermen. After re-supply, the mothership then moves out into the shipping lanes where the speedboats attack vessels, either for armed theft or to hold them for ransom. When ships are seized for ransom, the pirates usually take the vessel to the coast of Somalia near the pirate home ports of Eyl or Hobyo, where they are re-supplied with food and more pirates until the ransom money arrives in Somalia. Direct attacks on yachts by groups of fast open boats originating from this port are common.
However our cruisers think its safe as houses! Here's part of a post from June this year on this forum! (But he doesnt say when he went through
A couple of boats went from Uligan, Maldives straight to Al Mukalla, Yemen for clearance and had no problems. We cleared into Yemen at Al Mukalla,(after Salalah) about $US25. The agent Mahe is a very nice young man. He also gets deisel cheaper than Oman when we were there 56cUS, Oman was 90cUS through Mohammed. Although if careful at Salalah can get some at local prices if you are hiring a car.
We would not be happy going through the IRTC as it gets you closer to the pirates who are after the big ships and may see a small yacht as a nice diverson. Yemen coast guard is quite good but we had no use for them so cannot say for sure.
So it shows that people will belive 2 totally different things and they won't budge. Some will say that 'proves' yachts are not targets of pirates. Some -like me- avoid Al Makallah like the plague!
maybe the pirates dont piss in their own nest. But that doesnt mean they don't follow you out of port!
Great find. Was there a website attached to it?