This sport also requires knowledge of the area in which you plan to raft. Without knowing the terrain you risk running into surprises that you are not equipped to handle. For instance you will need to be able to know what the current could be doing on any given day and time. With out this knowledge you may find yourself in a current that is too swift for you to navigate, and as a result you could slam into an obstacle that is protruding from the water. You could even find yourself or one of your team members landing in the water when you least expect it.