Which type of service provides deconfliction advice without radar?

The correct answer is Procedural Service. This type of service is designed to provide air traffic control instructions to aircraft without the use of radar. Instead, it relies on established procedures and communication between pilots and air traffic controllers to maintain safe separation between aircraft.

Procedural Service is particularly important in areas where radar coverage is limited or unavailable, allowing for effective management of air traffic through prescribed routes and altitudes. In this context, deconfliction refers to the process of providing instructions to ensure aircraft remain safely separated from each other, based on the information available.

In contrast, other options focus on different aspects of air traffic management. Traffic Service involves providing information about traffic in the vicinity, while Alerting Service is concerned with notifying appropriate authorities about specific aircraft situations, such as emergencies. Finally, Deconfliction Service implies a more active approach to separation, generally associated with radar service, which is not the case here.