The aircraft is operated under all applicable conditions and limitations contained in the MEL and the letter authorizing the use of the list. The following RMA’s have ADS-B Height Monitoring Systems:A portable GPS Monitoring Unit (GMU), or an Enhanced GMU (EGMU), is a mobile system used to record the geometric height of an aircraft in flight using Global Positioning System (GPS) signals. The North Atlantic (NAT) was the first region to introduce RVSM, in 1997.
29 June 2010 Page 1 of 7 RVSM MINIMUM MONITORING REQUIREMENTS: AS OF: 29 June 2010 . . h��mk�6���>��`�]�� IzІr w����$�v}���K��ko6���A>�J��e$�/�ڱ�q�=P�� -��W�C-͡&�p�AM1YJ5͔(-�S��Z��C�c�������Ϫ]}k�����7o���]�n/�)Ϋ�_���cÌ���u�:��-.��ÎIU\l�����0?��e�ܢ��Z-�_~�^�����b�7�j�#�.�U]�&(����������k�_5ۺ�{,.7�U�Ħ��E�,�wM�\ܝ��5+���^}`\����S�}�����l�?�N��o߆}�Ρ��꿬�6���C�q�>]���b��5��6,�_���p��oU�"�.�>j�����-�慹��ݍ����"tɤ��C4���4�_�q�Q�����e %�Ӡ�$�c�NB��%�B7�X���)�ǾP�W��ϩ_x����:�$�Ҏg��H �rI��Xw���yL0T �^1"J �������ɵ a�� CpK�N�HS���h =T (2) For each condition in the full RVSM flight envelope, the largest combined absolute value for residual static source error plus the avionics error may not exceed 200 feet. These Ground-based systems are known as Height Monitoring Units (HMUs) or Aircraft Geometric Height Measuring Elements (AGHMEs). It allows aircraft to safely fly more optimum profiles, gain fuel savings and increase airspace capacity. (b) The altimetry system error (ASE) of the aircraft does not exceed 200 feet when operating in RVSM airspace.Note: An aircraft or operator not meeting the requirements for RVSM operations including an aircraft without operable RVSM equipment is referred to as non-RVSM. Each of these methods is briefly described below with links to the relevant Regional Monitoring Agency’s (RMA’s) webpage responsible for each specific monitoring system. (a) Except as provided in paragraph (b) of this section, no person may operate a civil aircraft in airspace designated as Reduced Vertical Separation Minimum (RVSM) airspace unless:(1) The operator and the operator's aircraft comply with the minimum standards of appendix G of this part; and(2) The operator is authorized by the Administrator or the country of registry to conduct such operations. The aircraft design ensures the aircraft will meet RVSM performance requirements; and2. You also need to know the country-specific rules that may not be what you are expecting in terms of flight level selection and contingency procedures.

The actual altitude of the aircraft is compared to the assigned altitude of the aircraft and the altitude displayed in the cockpit to calculate the Total Vertical Error (TVE), Altimetry System Error (ASE) and the Assigned Altitude Deviation (AAD) where:To find out more about the ASE, its potential causes and the importance of identifying aircraft that are exhibiting ASE, visit Height-keeping performance monitoring is carried out using one of three main methods: ground based monitoring; ADS-B monitoring and GPS monitoring. ICAO Equipment Requirements [ICAO Doc 9574, ¶5.1.1. Why?say you need record of approval from your state of registry.

A Complete Manual for Conducting International Flight OperationsEvery aircraft which is capable of flight in RVSM, generally flight levels 290-410, although it varies around the world, must receive special approval to do so and the aircraft’s equipment must be certified and inspected for flight operations in RVSM airspace.Failures of any of the required equipment should be referenced against the aircraft MEL to determine RVSM capability. To approve group aircraft for which application for type certification is made after April 9, 1997, the Administrator must find that the altimetry system error (ASE) is contained as follows:(1) At the point in the full RVSM flight envelope where mean ASE reaches its largest absolute value, the absolute value may not exceed 80 feet. (e) Altimetry system error containment: Group aircraft for which application for type certification is made after April 9, 1997. (c) Altitude-keeping equipment: All aircraft. UPDATE OF MONITORING REQUIREMENTS TABLE AND WEBSITE. Examples of limitations would be required equipment, (Pilot and copilot primary altimeters with independent cross coupled static sources, autopilot, altitude alerter and transponder), pilot training requirements, minimum speeds for flight in RVSM, minimum weights for RVSM, etc. (b) Except as specified in Section 9 of this appendix, an applicant seeking authorization to operate within RVSM airspace must apply in a form and manner prescribed by the Administrator. The package must consist of at least the following:(1) An identification of the RVSM aircraft group or the nongroup aircraft;(2) A definition of the RVSM flight envelopes applicable to the subject aircraft;(3) Documentation that establishes compliance with the applicable RVSM aircraft requirements of this section; and(4) The conformity tests used to ensure that aircraft approved with the data package meet the RVSM aircraft requirements.
Instruments and equipment required for specific operations by 14 CFR part 91. (f) Altimetry system error containment: Nongroup aircraft. To issue an RVSM authorization under this section, the Administrator must find that the operator's aircraft have been approved in accordance with Section 2 of this appendix and the operator complies with this section. After March 31, 2002, unless otherwise authorized by the Administrator, if you operate an aircraft that is equipped with TCAS II in RVSM airspace, it must be a TCAS II that meets TSO C-119b (Version 7.0), or a later version. You should always follow your primary resources first (aircraft manuals, government regulations, etc. (c) The avionics units installed in each aircraft to meet the minimum RVSM equipment requirements of this appendix are: (1) Manufactured to the same manufacturer specification and have the same part number; or (2) Of a different manufacturer or part number, if the applicant demonstrates that the equipment provides equivalent system performance. Since then RVSM has been introduced across the world.When an aircraft is height monitored, the Altimetry System Error (ASE) of the aircraft is estimated to establish the accuracy of the aircraft’s altimeter equipment.