Thanks Simon, Yes, I have since checked it out and, as you say, Riyan is on the Yemen side of the border with Oman, about 500 km east of Aden.
Ah, the Porter. Quite common here in Switzerland of course. In fact one flew over my house a couple of days ago.
Did you find the oil?
You may know of the old oil related airfield at 23N 55E, just on the UAE side of the Oman border. Look on Google Earth and you will see it, a T-shaped runway layout, 1500M long E-W runway. I visited it a few years ago. Still in good nick. Why was I there? Beacuse I saw it on GE and also because being at 23/55 a friend wanted to go to that intersection!
I have pictures.
See thread
http://www.pprune.org/aviation-histo...-uae-oman.html
Edit: I42: silly me, you contributed to that thread. I had forgotten!!!
Laurence