I occasionally give the helmsman extra information if I think he can deal with it and break it down fast enough. For example, what I might see and say to myself is, "Lots of breeze (really dark water), in a very small patch, same direction as current breeze, coming fast." What I tell the helmsman is, "5 knots more breeze, this direction, lasting 7 to 10 seconds, followed by a lull, and then the same breeze we've had, in 3 . . . 2 . . . 1." This allows the helmsman to make a drastic adjustment for the puff, knowing how long he has to stay depowered, when he can start to power up again, and to what degree.