Make sure to converse with your trimmer and/or driver beforehand to determine the language that will be most helpful for them. You have to remember that while you are looking up course, your fellow crew trimming the sails will likely be looking down course, or up at the sails. Saying "puff coming on the right" might be confusing – your right, my right, course right, downwind right? A good general rule is to call the puffs where they fall over the shoulder of your forward-facing crew members. For example, say"puff over your right shoulder," this makes it easy for trimmers or helmsmen to look back over their shoulder to see the incoming breeze and react accordingly.