GM3 ATS.TR.155(c)(9) ATS surveillance services

• ED Decision 2020/008/R found in: ATM/ANS Provision of Services (2017/373) (Feb 2023)

GM3 ATS.TR.155(c)(9) ATS surveillance services ED Decision 2020/008/R MINIMUM SAFE ALTITUDE WARNING (MSAW) PROCEDURES The generation of MSAWs is a function of an ATS surveillance data-processing system. The objective of the MSAW function is to assist in the prevention of controlled flight into terrain accidents by generating, in a timely manner, a warning of the possible infringement of a minimum safe altitude. Procedures and related instructions concerning the use of the MSAW function should specify, inter alia: (a)       the types of flight which are eligible for generation of MSAW; (b)       the sectors or areas of airspace for which MSAW minimum safe altitudes have been defined and within which the MSAW function is implemented; (c)       the values of the defined MSAW minimum safe altitudes; (d)       the method of displaying the MSAW to the air traffic controller; (e)       the parameters for generation of a MSAW as well as warning time; and (f)        conditions under which the MSAW function may be inhibited for individual aircraft tracks as well as procedures applicable in respect of flights for which MSAW has been inhibited. GM3 ATS.TR.155(c)(9) ATS surveillance services ED Decision 2020/008/R MINIMUM SAFE ALTITUDE WARNING (MSAW) PROCEDURES The generation of MSAWs is a function of an ATS surveillance data-processing system. The objective of the MSAW function is to assist in the prevention of controlled flight into terrain accidents by generating, in a timely manner, a warning of the possible infringement of a minimum safe altitude. Procedures and related instructions concerning the use of the MSAW function should specify, inter alia: (a) the types of flight which are eligible for generation of MSAW; (b) the sectors or areas of airspace for which MSAW minimum safe altitudes have been defined and within which the MSAW function is implemented; (c) the values of the defined MSAW minimum safe altitudes; (d) the method of displaying the MSAW to the air traffic controller; (e) the parameters for generation of a MSAW as well as warning time; and (f) conditions under which the MSAW function may be inhibited for individual aircraft tracks as well as procedures applicable in respect of flights for which MSAW has been inhibited.