GM2 SPA.HOFO.125 Offshore standard approach procedures (OSAPs)

• ED Decision 2022/012/R found in: Air Operations (965/2012) Part-ARO Part-ORO Part-CAT Part-SPA Part-NCC Part-NCO Part-SPO (Sep 2023)

GM2 SPA.HOFO.125 Offshore standard approach procedures (OSAPs) ED Decision 2022/012/R GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS)/AREA NAVIGATION SYSTEM — AIRBORNE RADAR APPROACH (ARA) Where an ARA is conducted to a non-moving offshore location (i.e. fixed installation or moored vessel), and the GNSS/area navigation system is used to enhance the safety of the ARA, the following procedure or equivalent should be applied: (a) selection from the area navigation system database or manual entry of the offshore location; (b) manual entry of the final approach fix (FAF) or intermediate fix (IF), as a range of and bearing from the offshore location; (c) the full-scale deviation of the GNSS/area navigation system display should be in accordance with the expected navigation performance, and be no greater than 1 NM; (d) comparison of weather radar and GNSS range and bearing data to cross-check the position of the offshore location; (e) use of GNSS guidance to guide the aircraft onto the final approach track during the initial or intermediate approach segments; (f) use of GNSS guidance from the FAF towards the offset initiation point (OIP) during the final approach segment to establish the helicopter on the correct approach track and, hence, heading; (g) transition from GNSS guidance to navigation based on headings once the track is stabilised and before reaching OIP; (h) use of GNSS range of and bearing to the offshore location during the intermediate and final approach segments to cross-check weather radar information (for correct ‘painting’ of the destination and, hence, of other obstacles); (i) use of GNSS range of the offshore location to enhance confidence in the weather radar determination of arrival at the OIP and MAPt; and (j) use of GNSS range of and bearing to the destination to monitor separation from the offshore location. GM2 SPA.HOFO.125 Offshore standard approach procedures (OSAPs) ED Decision 2022/012/R GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS)/AREA NAVIGATION SYSTEM — AIRBORNE RADAR APPROACH (ARA) Where an ARA is conducted to a non-moving offshore location (i.e. fixed installation or moored vessel), and the GNSS/area navigation system is used to enhance the safety of the ARA, the following procedure or equivalent should be applied: (a) selection from the area navigation system database or manual entry of the offshore location; (b) manual entry of the final approach fix (FAF) or intermediate fix (IF), as a range of and bearing from the offshore location; (c) the full-scale deviation of the GNSS/area navigation system display should be in accordance with the expected navigation performance, and be no greater than 1 NM; (d) comparison of weather radar and GNSS range and bearing data to cross-check the position of the offshore location; (e) use of GNSS guidance to guide the aircraft onto the final approach track during the initial or intermediate approach segments; (f) use of GNSS guidance from the FAF towards the offset initiation point (OIP) during the final approach segment to establish the helicopter on the correct approach track and, hence, heading; (g) transition from GNSS guidance to navigation based on headings once the track is stabilised and before reaching OIP; (h) use of GNSS range of and bearing to the offshore location during the intermediate and final approach segments to cross-check weather radar information (for correct ‘painting’ of the destination and, hence, of other obstacles); (i) use of GNSS range of the offshore location to enhance confidence in the weather radar determination of arrival at the OIP and MAPt; and (j) use of GNSS range of and bearing to the destination to monitor separation from the offshore location. ##### GM2 SPA.HOFO.125 Offshore standard approach procedures (OSAPs) *ED Decision 2022/012/R* **GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS)/AREA NAVIGATION SYSTEM — AIRBORNE RADAR APPROACH (ARA)** Where an ARA is conducted to a non-moving offshore location (i.e. fixed installation or moored vessel), and the GNSS/area navigation system is used to enhance the safety of the ARA, the following procedure or equivalent should be applied: (a) selection from the area navigation system database or manual entry of the offshore location; (b) manual entry of the final approach fix (FAF) or intermediate fix (IF), as a range of and bearing from the offshore location; (c) the full-scale deviation of the GNSS/area navigation system display should be in accordance with the expected navigation performance, and be no greater than 1 NM; (d) comparison of weather radar and GNSS range and bearing data to cross-check the position of the offshore location; (e) use of GNSS guidance to guide the aircraft onto the final approach track during the initial or intermediate approach segments; (f) use of GNSS guidance from the FAF towards the offset initiation point (OIP) during the final approach segment to establish the helicopter on the correct approach track and, hence, heading; (g) transition from GNSS guidance to navigation based on headings once the track is stabilised and before reaching OIP; (h) use of GNSS range of and bearing to the offshore location during the intermediate and final approach segments to cross-check weather radar information (for correct ‘painting’ of the destination and, hence, of other obstacles); (i) use of GNSS range of the offshore location to enhance confidence in the weather radar determination of arrival at the OIP and MAPt; and (j) use of GNSS range of and bearing to the destination to monitor separation from the offshore location.