We commonly use divers to investigate problems with material trapped around the propeller shaft of boats. If you're unfortunate enough to get a rope wrapped around your propeller, your boat will either become slow and difficult to handle or stall the engine completely rendering your boat inoperable.
In such cases we would generally send in a diver to deal with the problem in-situ. If you choose to pay for optional Diver Waiver (£10.00), you will not be responsible for the cost of getting a diver.