Which areas are marked with an 'R' followed by a number and are shown in blue?

The areas marked with an 'R' followed by a number and shown in blue are classified as restricted areas. These zones are designated for specific military operations or activities and are subject to restrictions on airspace use. The purpose of these restrictions is to safeguard both the aircraft operating in the vicinity and the activities taking place within those areas, which often include live fire exercises or other military maneuvers.

The designation system, where 'R' indicates restricted airspace, helps pilots easily recognize these areas on aeronautical charts, ensuring they comply with airspace rules. When flying in or near restricted areas, pilots must be aware of the potential dangers and the need for prior permission from the controlling authority to enter these zones. Understanding the significance and regulations surrounding these restricted areas is essential for safe and compliant flight operations in the vicinity of military activities.