Where should a cruise clearance with no crossing restriction be issued?

A cruise clearance with no crossing restriction is typically issued at airports where no Instrument Approach Procedure (IAP) is published. This is because such clearances serve as a means of providing pilots with the ability to navigate safely through airspace where traditional procedures and guidance are not available. When an airport lacks an IAP, it may imply that the procedures for arriving and departing from that airport are less structured, thus granting cruise clearance allows for more flexibility in managing flight paths while maintaining safety.

In contrast, at controlled airports and airports with published IAPs, clearances often come with specific routing instructions and restrictions that help ensure that traffic is properly managed and segregated according to the defined procedures. Military bases similarly follow strict protocols for air traffic control, which typically involve structured approaches and clearances, making them less likely to issue a cruise clearance without restrictions.