Visual AOB methods

AOB can be obtained by several visual methods. The most rudimentary being simply eyeballing. A skilled player can train them selves to estimate the AOB with sufficient accuracy to reliably hit targets at close range (<1000m). For shooting at longer ranges however more accurate methods are required. Possibly the most popular is to find a ship with a king post. A king post is a special kind of mast consisting of two sturdy parallel masts, often called a goal post due to it's appearance. While overtaking a convoy the two masts will visually merge, and start to become narrower. At the point where they are at their narrowest, The AOB of that ship will be 90 degrees. Hence this method has been christened kingpost 90. Though other types of masts can be used in place of a king post if none are available. A second accurate method is to sail straight aft or ahead of the convoy. As you cross their course line, you will clearly be able to see when you are exactly on their course line. Thus AOB can be set to 180 or 0 respectively. This method was sometimes used historically.