How must soundings be represented in a hydrographic survey?

Soundings in a hydrographic survey are typically represented in feet and tenths in black. This convention is used to maintain standardization, ensuring that the data is easily readable and understood by anyone interpreting the hydrographic charts. Using a consistent unit of measurement helps avoid confusion and enhances the accuracy of navigation and depth interpretation.

The use of black for soundings on charts provides a clear contrast against the background, making the information readily visible and discernible to users. This color choice is a common practice in nautical charting, where clarity and readability are paramount. The uniformity in the presentation of soundings, such as using feet and tenths, also allows for easy comparisons and integration with other data collected during the survey.

Other methods of representation, such as using different colors for shallow and deep areas or relying solely on descriptive text, could complicate the interpretation of depths and lead to misinterpretations during navigation. A sole emphasis on descriptive text might obscure the precise measurements that are crucial for safe navigation and operational planning in maritime activities.