Hello. As a captain you will most likely be allocated a villa/apartment in either Ain Khalid Gate or Al Markhiya (there are a couple of other smaller compounds as well). Alternatively you can request the housing allowance and find your own accommodation.
I found some photos on the internet of Ain Khalid Gate. These aren't my photos, so I hope the owners don't mind me linking to them:
http://commondatastorage.googleapis....al/6669315.jpg
http://commondatastorage.googleapis....al/6669286.jpg
http://lh3.ggpht.com/_srQOdvkkeqE/R2...4/IMG_2778.JPG