3.3.1.1 The Air Traffic Service is provided by the Air Navigation DirectionTORG_AUTH;TXT_NAME;126 (DNATORG_AUTH;CODE_ID;126), through the Air Traffic Operation ServiceTUNIT;TXT_NAME;938 (SOTATUNIT;CODE_ID;938), of ASA - Aeroportos e Seguranca Aerea - S.A.TORG_AUTH;TXT_NAME;918.

3.3.1.2 The services are provided in accordance with the provision contained in the following ICAO documents

1. ANNEX 2 - Rules of the Air

2. ANNEX 11 - Air Traffic Services

3. DOC 4444 - Procedures for Air Navigation Services - Air Traffic Management (PANS - ATM)

4. DOC 8168 - Procedures for Air Navigation Services - Aircraft Operations (PANS - OPS)

5. DOC 7030 - Regional Supplementary Procedures

3.3.2.1 Air Traffic Services are provided for the entire territory of Cabo Verde, including its territorial waters as well as the airspace over the high seas within the SAL OCEANIC FIRTAIRSPACE;TXT_NAME;414 / UIRTAIRSPACE;TXT_NAME;415.

3.3.2.2 In some cases, in accordance with the regional air navigation agreement, air traffic services are provided, under the delegated authority, in the airspace within another bordering FIR. Details of such services are provided in section ENR 2.

3.3.3.1 The following types of service are provided:

1. Flight Information Service (FIS) and Alerting Services (FIC)

2. Area Control (ACC)

3. Approach Control (APP) and

4. Radar

3.3.3.2 The following types of services are provided at aerodromes:

1. Aerodrome Control (TWR), or

2. Aerodrome Flight Information (AFIS), where applicable

3.3.3.3 Provision of flight information service within SAL OCEANIC FIRTAIRSPACE;TXT_NAME;414

Flight Information service (FIS) is a non - radar service provided, either separately or in conjunction with other services, for the purpose of supplying information useful for the safe and efficient conduct of flights. Under a FIS the following conditions apply:

1. Provision of the service includes information about weather, changes of serviceability of facilities, conditions at aerodromes and any other pertinent information.

2. The controller may attempt to identify the flight for monitoring and coordination purposes only. Such identification does not imply that the radar service is being provided or that the controller will continuously monitor the flight. Pilots must be left in no doubt that they are not receiving a radar service.

3. Controller are not responsible for separating or sequencing aircraft.

   In addition to the above, controllers will, subject to workload, provide pilots with information concerning collision hazards to aircraft operating in Class "G" airspace when self evident information from any source indicates that the risk of collision may exist. It is accepted that this information may be incomplete and the controller cannot assume responsibility for its issuance at all times or for its accuracy. At ACC, controllers will provide FIS on request to aircraft both along with and, when necessary, separate from other service provision. This service is provided on ATC sector on its associated frequency. Warnings of proximity hazards should be issued when, from aircraft reports, they are self evident but decision to make any alteration to the flight profile remains with the pilot. Warnings are issued at the discretion of the controller and take the form of traffic information passed to each involved flight.

3.3.5.1 The minimum flight altitudes on the ATS routes, as presented in section ENR 3, have been determined so as to ensure a least 300 M (1000 FT) vertical clearance above the highest obstacle within 8 KM (4.3 NM) on each side of the centre line of the route.

3.3.5.2 However, where the angular divergence of the navigational air signal, in combination with the distance between the navigation aids could result in an aircraft being more than 8 KM (4.3 NM) on either side of the centre line the 18 KM (9.7 NM) protection limit is increased by the extent to which the divergence is more than 8 KM (4.3 NM) from the centre line.