Which of the following is NOT a type of flight plan?

The correct answer indicates that SRP is not a recognized type of flight plan within the typical classifications. In aviation, flight plans are utilized to communicate the intended route, destination, and other relevant information about a flight to air traffic control and other relevant authorities.

Visual Flight Rules (VFR) and Instrument Flight Rules (IFR) are two primary categories of flight plans based on the conditions under which an aircraft operates. VFR is used for flights where pilots are able to maintain visual contact with the ground and navigate visually, while IFR is utilized for flying in a wider range of weather conditions where pilots rely on instruments for navigation and control.

DVFR stands for Defense VFR and is a special type of VFR flight plan that helps in managing flights in and out of airspace designated for national security reasons, often under military jurisdiction.

Given that SRP is not commonly recognized or categorized among official flight plan types, it stands out as the correct answer in this question, confirming the importance of understanding the various classifications of flight plans in aviation operations.