In preparation of a delivery trip from Thailand to Greece on which I will be crewing, I've downloaded sattelite immages of the Gulf of Aden and the west coast of the Red Sea and created .mbtiles 'charts' from them. All Red Sea charts are defined at zoomlevels 10, 14, 16 and 18. The Gulf of Aden is at levels 10,13,14,16,17
You can download those files (each between 5 and 9 Gb) from here: