YES and they are in your cabin! white for cabin use and blue for swimming pool.
You do on OV1 you are bound to on the sister ship
Yes towels are changed daily if need be and you gey pool towels as wel.
My understanding, according to the brochure, is you get all your towels, for both the cabin and the pool, provided. You can also take the pool towels off the boat on trips at port and all towels will be changed daily ( I plan on leaving them on the floor to indicate they are dirty). At least I hope this is correct we go on OV2 in 3 weeks and I do not intend to take any towels with us.