How do I write on nautical charts?
Use pencil to write on nautical charts, and use care so as not to smudge or tear them. Try to avoid erasures, as these too create smudges. Indecipherable or illegible marks and notations can create confusion for other people who use the charts. Write notations such as current position, fixes, speed, log and course as you progress over water. Use course over ground (COG), drift and velocity made good (VMG) to keep track of performance.Roll a nautical chart to prevent smudging and unwanted wrinkles—these can also lead to confusion. Fold a chart if you have less room for storage onboard or to file on land for future use. Try to minimize the number of folds, as too many might make the chart hard to read. People write on nautical charts to document navigation choices and to keep records in case they wish to traverse the same waters at another time.