# Terms, Acronyms, Abbreviations

<table data-header-hidden><thead><tr><th width="155"></th><th></th></tr></thead><tbody><tr><td>AGL</td><td>Above Ground Level.</td></tr><tr><td>ATS</td><td>Autonomous Triggering System that is independent of any flight critical system of the DJI M3D/T. Used to initiate parachute deployment upon detection of a critical failure of the DJI M3D/T during flight.</td></tr><tr><td>Authorized Dealer</td><td>An AVSS approved distribution partner who sells the PRS-M3DTEX.</td></tr><tr><td>Drone</td><td>When referring to a DJI M3D/T, other relevant terms include Aircraft, RPAS, sUAS, UAS, and UAV.</td></tr><tr><td>EFTS</td><td>External flight termination system, a device that disables power to the drone, and which ensures compliance with EASA MOC 2511.</td></tr><tr><td>End-User</td><td>The owner of the PRS-M3DTEX who had purchased the system from an AVSS Authorized Dealer.</td></tr><tr><td>Energetic Charge Warning</td><td>The PRS-M3DTEX utilizes an automotive pyrotechnic as the means of deployment. These charges are similar to those in automobile airbag and seat belt systems. Caution should always be observed around the system. Ensure the system is never pointing towards someone. Note, throughout this document, the pyrotechnic charge is referenced as an "Energetic Charge".</td></tr><tr><td>FTS</td><td>Flight Termination System is a device that will disable the propulsion system of the DJI M3D/T.</td></tr><tr><td>IP Rating</td><td>Ingress Protection Rating.</td></tr><tr><td>MTD</td><td>The Manual Triggering Device, initiated by arming the PRS through the DJI M3D/T Drone Transmitter. Allows for manual deployment of the PRS-M3DTEX system and is accessed through the Transmitter PSDK Interface. </td></tr><tr><td>MDA</td><td>The Minimum Deployable Altitude is the lowest altitude at which the PRS-M3DTEX is rated to deploy successfully as per ASTM F3322. The pilot must fly over people at the MDA or higher to maintain regulatory compliance.<br><br>Per ASTM F3322-22, "the minimum deployable altitude of the PRS will be determined by the greatest recorded difference during all automatic deployments, plus 16.4 ft  (5 meters) will be added to the minimum operating altitude rating to ensure the PRS is at stabilized descent rate before it reaches ground level" (ASTM F3322-22, 6.4.3.9).</td></tr><tr><td>Flight Mode</td><td>The PRS-M3DTEX shall be used only in Normal Mode (N-Mode), Mission Mode, or Low-Speed Mode (T-Mode). N-Mode works best when the GPS signal is strong or in Mission Mode. The DJI M3D/T utilizes GPS and Forward and Downward Vision Systems to locate itself, automatically stabilize, and navigate between obstacles. Complete details can be found at <a href="https://enterprise.dji.com/dock-2/specs">https://enterprise.dji.com/dock-2/specs</a>.</td></tr><tr><td>Parachute Pod™</td><td>This refers to the non-replaceable Parachute Pod™ that contains the parachute of the AVSS PRS-M3DTEX.</td></tr><tr><td>PRS</td><td>As per ASTM F3322, a PRS is a "summation of the components of a parachute recovery system that work to reduce descent velocity."</td></tr><tr><td>PRS-M3DTEX</td><td>The version of the PRS-M3DT parachute recovery system covered in this manual, which contains the external flight termination system (EFTS) for MOC 2511 compliance.</td></tr><tr><td>PSDK</td><td>Payload Software Development Kit. This is the software application between the drone and the PRS-M3DTEX.</td></tr><tr><td>Shall and Must</td><td>“shall” and/or "must" versus “should” versus “may”, v—use of the word “shall” and/or "must" implies that a procedure or statement is mandatory and shall be followed to comply with this specification. “should” implies that this procedure/statement is recommended, and “may” implies that it is optional at the discretion of the supplier, manufacturer, or operator.</td></tr></tbody></table>


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