Final answer:
If a departure airport has an instrument approach but no published ODP, pilots must adhere.
Step-by-step explanation:
If a departure airport has an instrument approach but no published ODP (Obstacle Departure Procedure), pilots must achieve a minimum flight profile to ensure obstruction clearance during departure. One way to achieve this is by adhering to the missed approach procedure specified in the instrument approach.
The missed approach procedure outlines the necessary altitude and course corrections required in case the pilot needs to abort the approach due to low visibility or other factors. By following this procedure, pilots can ensure they maintain a safe altitude and avoid any obstacles during departure.
Adherence to these guidelines provides a margin of safety in the absence of a published ODP.