For example, the upper reaches of the Pungo River have red marks to port and green to starboard when you are heading south. There are several places on the ICW where the navigation marks of a river reverse the normal color scheme you expect. Note these areas on the charts before they cause confusion. Ranges are unfamiliar to many boaters, but they are frequent on the Waterway. Usually, the front mark in a range will be below the rear mark when the two are in alignment.
Ranges often have a vertical orange stripe to aid in daytime identification.
When the front and back marks are aligned, the orange stripes are aligned. Most ranges are lit at night, and the daymarks are fluorescent. An example of a range is found in the mouth of Adams Creek, just after Mile 185. Occasionally, you will need to plot a compass course across a sound or large bay, but most of these have been pre-plotted in our chartbook. We have used plotted courses on well-marked stretches when visibility was poor, or caught out at night.