My guess is PVC, but the links above will prove the fabric type. From the size of the hole you will need an inner repair. If you were to apply an outer repair only the fabric would be under too much stress and the repair would fail quite quickly under pressure.
Here's a guide I made a few years back that will assist in the repair process.
The rubbing strake will be cause a few issues and will have to be pulled back. I'd say the strake is thermobonded, so heat will assist in removal here. The outer patch should extend 1 to 1.5 inches passed the damaged fabric on either side, so say 10 to 11 inches in width and approx 7 inches in height - as a guide.
Large Hole Repair | Inflatable Boat Repairs