The compass roses I created will help save time and confusion while in the field. To use them, you will need to determine the magnetic declination of the area you will be in. That information will be indicated on most high quality maps. However, you must be sure that the information is current.
Magnetic declination changes over time.
If you are in doubt you can get the current declination at most airports and marinas. There are also several websites that will calculate the declination for any U.S. location and date. Once you know what declination you will be using simply click on the appropriate rose from the table below. Download the picture of it from your browser and then using a graphics editor program select and paste it on your map. You will want to place roses on several prominent locations.