Which is true regarding the use of an Instrument Departure Procedure (DP) chart?

The correct choice emphasizes that the pilot must have at least the textual description of the approved standard departure to utilize an Instrument Departure Procedure (DP) chart. This is essential because the textual information provides vital details about the procedure, including significant waypoints, altitudes, and other critical instructions necessary for a safe and compliant departure.

Understanding that the textual description accompanies the graphical representation ensures that pilots can visualize and interpret the departure routes correctly. While having both the textual and graphic forms can enhance situational awareness, the key requirement is the possession of the textual description, which contains all necessary information to execute the DP safely.

In contrast, stating that DP usage is mandatory for IFR departures at all airfields would overlook certain airfields that do not have DPs. Other options either incorrectly emphasize the necessity of graphic forms or incorrectly indicate the optional nature of DPs for IFR departures, which can mislead on the procedural requirements for various airfields. Therefore, the emphasis on possessing the textual description aligns directly with the regulated requirements for pilots utilizing DPs.