I can't really remember where the Hind is will look that up. There are 2 guards at the entrance of the base. Just shoot them with the m21. refuel the hind, take off fly north allong the eastern coastline. The scud will not show up on your radar as a red dot. I believe it was white in my case. just sellect it and shoot it. It is near a building I believe and it is very hard to see. It showed up on my map as a red truck. And it is near the norhtern point of the island marked as enemy territory. There also is a ship near it which I destroyed in case Guba wanted to use it to escape. there are some shilkas there too so watch it and destroy them before they get you. after that you should fly back along the road on the west side of the island to the south. There is a moving UAZ there somewhere with guba. You can land and ambush it and arrest guba but I just shot it from the Hind, accidents happen!
One thing you can do is use a first try of the mission to recon. remember where all the targets are and then when you retry the mission mark these targets on the map. It makes finding the scud and guba a little easier.