Exposure classifications B and C apply to non-coastal locations. Exposure D is a shifting target from the coast dependent on numerous criteria, one of which being the height of the structure in issue. A step-by-step guide is provided below. Please view the following image for a more visual portrayal. 1. Determine if your location is coastal or not coastal. If you are not sure whether or not it's coastal, then it's not necessary for you to do any further research into this topic. However, if you want to be certain that you're giving the proper exposure classification, then read on! 2. Calculate the distance to the nearest coastline. You can use many different methods to calculate distances, such as using a GPS device, measuring with meter sticks, or estimating based on surrounding features. 3. Based on the results of Step 2, your location may be considered coastal. If so, continue reading! 4. Calculate the height of the structure in question. This can be done by using either physical measurements or estimates. For example, if there are no physical structures around you that you can use as references, then you may need to estimate the height of the structure. 5. Use your results from Steps 3 and 4 to determine the appropriate exposure classification for your structure. The key factor here is how high your structure is compared to its proximity to the coast.