On a SID/DP, what should you initially fly?

When flying a Standard Instrument Departure (SID) or Departure Procedure (DP), the primary focus during the initial phase of the flight is to follow the established initial climb instructions. These instructions are specifically designed to guide pilots on the correct routing and altitude to maintain immediately after takeoff, ensuring safe separation from terrain, obstacles, and other air traffic.

The initial climb instructions are crucial because they provide a structured way to safely navigate the departure path. They often include specific headings, altitudes to reach, and any necessary turns. By adhering to these instructions, a pilot can effectively manage the aircraft's climb while transitioning from the phases of takeoff to en route, which enhances safety during what can be a busy and critical phase of flight.

In contrast, while your flight plan contains important navigation details, it primarily guides the overall route to your destination rather than the immediate actions post-departure. Final approach instructions come into play much later in the flight and are not relevant during the SID/DP phase. Similarly, descent procedures are applicable to the later stages of a flight when preparing to land. Therefore, the initial climb instructions are the most pertinent and essential element to follow when you are departing under a SID/DP.