Your chart indicates that there is an isolated rock and names the rock using vertical letters. This indicates the __________.

Correct Answer: Option A — rock is dry at high water

According to NOAA Chart No. 1, the use of vertical (upright) lettering for a feature name indicates that the feature is dry at high water. Conversely, features that are submerged or only visible at low water are labeled using slanted (italic) lettering to distinguish their status to the mariner.