EN 4709-005:2025
(Main)Aerospace series - Unmanned Aircraft Systems - Part 005: Verification method for the geocaging function
Aerospace series - Unmanned Aircraft Systems - Part 005: Verification method for the geocaging function
Luft- und Raumfahrt - Unbemannte Luftfahrzeugsysteme - Teil 005: Überprüfungsmethode für die Geocaging-Funktion
Série aérospatiale - Aéronefs télépilotés - Partie 005 : Méthode de vérification de la fonction de géocage
Le présent document fournit les exigences, méthodes d'essai et critères d'acceptation pour :
- la fonction de géocaging mise en oeuvre utilisée pour empêcher l'UA d'enfreindre les limites horizontales et verticales du volume opérationnel prévu ;
- les informations à fournir dans les instructions du fabricant décrivant cette fonction, ses limites et la taille requise du volume de contingence après prise en compte des erreurs, du temps de réaction et des corrections.
Aeronavtika - Letalski sistemi brez posadke - 005. del: Metoda preverjanja funkcije Geocaging
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 4709-005:2023
01-november-2023
Aeronavtika - Letalski sistemi brez posadke - 005. del: Metoda preverjanja funkcije
Geocaging
Aerospace series - Unmanned Aircraft Systems - Part 005: Verification method for the
Geocaging function
Luft- und Raumfahrt - Unbemannte Luftfahrzeugsysteme - Teil 005:
Überprüfungsmethode für die Geocaging-Funktion
Série aérospatiale - Aéronefs télépilotés - Partie 005: Méthode de vérification de la
fonction géeocaging
Ta slovenski standard je istoveten z: prEN 4709-005
ICS:
03.220.50 Zračni transport Air transport
49.020 Letala in vesoljska vozila na Aircraft and space vehicles in
splošno general
oSIST prEN 4709-005:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 4709-005:2023
oSIST prEN 4709-005:2023
DRAFT
EUROPEAN STANDARD
prEN 4709-005
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2023
ICS
English Version
Aerospace series - Unmanned Aircraft Systems - Part 005:
Verification method for the Geocaging function
Série Aérospatiale - Aéronefs télépilotés - Partie 5: Luft- und Raumfahrt - Unbemannte
Méthodes de vérification de la fonction Geocaging Luftfahrzeugsysteme - Teil 005: Überprüfungsmethode
für die Geocaging-Funktion
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 471.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4709-005:2023 E
worldwide for CEN national Members.
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prEN 4709-005:2023 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 List of abbreviated terms . 8
5 Geocaging function requirements . 8
5.1 Detailed requirements . 8
5.2 Programming the flight geography and the operational volume . 10
5.2.1 Performance requirements . 10
5.2.2 Verification method . 11
5.2.3 Pass criteria . 11
5.2.4 Performance requirements . 11
5.2.5 Verification method . 12
5.2.6 Pass criteria . 12
5.3 Flight plan limitations . 12
5.3.1 Performance requirements . 12
5.3.2 Verification method . 13
5.3.3 Pass criteria . 14
5.4 Containment of the UA inside the FG . 14
5.4.1 Performance requirements . 14
5.4.2 Verification method . 14
5.4.3 Pass criteria . 19
5.5 Triggering of the flight termination function by geocage . 19
5.5.1 Performance requirements . 19
5.5.2 Verification method . 20
5.5.3 Pass criteria . 20
6 Geocaging information requirements . 20
6.1 General. 20
6.2 Performance requirements . 20
6.3 Pass criteria . 22
Annex ZA (informative) Relationship between this European Standard and the Regulation
(EU) 2019/945 of 12th March 2019 on unmanned aircraft systems and on third-
country operators of unmanned aircraft systems . 23
Bibliography . 24
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European foreword
This document (prEN 4709-005:2023) has been prepared by Technical Committee CEN/TC 471
“Unmanned Aircraft Systems”, the secretariat of which is held by BNAE.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association and supports essential requirements of
EU Directive(s)/Regulation(s).
For relationship with EU Directive(s)/Regulation(s), see informative Annex ZA, which is an integral part
of this document.
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Introduction
This document gives all economic operators (such as manufacturers, importers and distributors and
their trade associations as well as bodies involved in the conformity assessment procedures) a viable
way to prove compliance with the requirements linked to geocaging function and to find commonality
in compliance methods.
The end user of this document assumes all responsibility for the safe application of the test methods.
All relevant safety/quality procedures should be considered. Special consideration should be given to
the operation of the UAS for evaluations. All local, state, federal, and national laws should be considered
when operating any UAS.
Operational volume and contingency volume are defined in SORA semantic model. Figure 1 provides a
consistent use of the terms. Figure 2 provides a graphical representation of the model.
Figure 1 — SORA semantic model [Source: Easy Access Rules for Unmanned Aircraft Systems,
September 2022]
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Figure 2 — Graphical representation of the SORA semantic model [Source: Easy Access Rules for
Unmanned Aircraft Systems, September 2022]
NOTE 1 SORA Step #9 – Adjacent area/airspace considerations and PDRA-G01, G02 and G03.
This document provides a contribution to SORA Step #9 compliance, requirement (b), also known as
Standard containment. Nonetheless, this document cannot be used as a complete means of compliance
to SORA Step #9, as it does not include design requirements.
NOTE 2 PDRA-G01, G02 and G03 also include this requirement in section technical provisions, Containment.
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1 Scope
This document provides requirements, test methods and pass criteria for the:
— implemented geocage function used to prevent the UA from breaching the horizontal and vertical
limits of the planned operational volume;
— information to be provided in the manufacturer’s instructions describing this function, its limits
and the required size of the contingency volume after accounting the errors, reaction time and
corrections.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 4709-001:—, Aerospace series — Unmanned Aircraft Systems — Part 001: Product requirements and
verification
EN 4709-006:—, Aerospace series — Unmanned Aircraft Systems — Part 006: Means to terminate flight,
requirements, and verification
EN 4709-007:—, Aerospace series — Unmanned Aircraft Systems — Part 007: General product
requirements for UAS classes C5 and C6
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 4709-001 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
caution alert
alert for conditions that require immediate awareness and subsequent response by the UAS remote
pilot
Note 1 to entry: in this document, the caution alert condition is related to the breach of the flight geography
volume.
Under preparation. Stage at the time of publication: prEN 4709-001:2021.
Under preparation. Stage at the time of publication: prEN 4709-006:2023.
Under development.
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3.2
command unit
equipment or system of equipment to control unmanned aircraft remotely as defined in point 32 of
Article 3 of Regulation (EU) 2018/1139 which supports the control or the monitoring of the unmanned
aircraft during any phase of flight, with the exception of any infrastructure supporting the command
and control (C2) link service
[SOURCE: Easy Access Rules for Unmanned Aircraft Systems, September 2022]
3.3
contingency measures
preventive or corrective action to be taken in response to an event and a need to depart from the agreed
plan of action
3.4
contingency volume
volume of airspace outside the flight geography where contingency procedures are applied
[SOURCE: Easy Access Rules for Unmanned Aircraft Systems, September 2022]
3.5
flight geography
volume(s) of airspace defined spatially and temporally in which the UAS operator plans to conduct the
operation under normal procedures
[SOURCE: Easy Access Rules for Unmanned Aircraft Systems, September 2022]
3.6
global navigation satellite system
GNSS
positioning system based on one or several satellite constellations
3.7
haptic signal
any type of signal that is transferred to the hand of the user through the handheld controller in the form
of vibrations
3.8
operational volume
combination of the flight geography and the contingency volume
[SOURCE: Easy Access Rules for Unmanned Aircraft Systems, September 2022]
3.9
UAS geographical zone
UGZ
portion of airspace established by the competent authority that facilitates, restricts, or excludes UAS
operations in order to address risks pertaining to safety, privacy, protection of personal data, security,
or the environment, arising from UAS operations
[SOURCE: Easy Access Rules for Unmanned Aircraft Systems, September 2022]
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3.10
warning alert
alert for conditions that require immediate awareness and immediate response by the UAS remote pilot
Note 1 to entry: In this document, the warning alert condition is related to the breach of the operational volume.
4 List of abbreviated terms
AGL Above Ground Level
AMSL Above Mean Sea Level
ARC Air Risk Class
ATO Above Take-Off Point
FG Flight Geography
FTS Flight Termination system
GNSS Global Navigation Satellite System
GRC Ground Risk Class
OV Operational Volume
Req. Requirement
RP Remote Pilot
RPS Remote Pilot Station
RTH Return To Home
UA Unmanned Aircraft
UAS Unmanned Aircraft System
UI User Interface
UGZ UAS Geographical Zone
5 Geocaging function requirements
5.1 Detailed requirements
The geocaging function shall provide a way to program the flight geography and the operational
volume.
The geocaging function has to be implemented on the UA and achieve the following objectives:
(1) ensure that, in normal operation, the UA is maintained inside the flight geography;
(2) once breaching the FG, the geocage function shall bring back the UA inside;
(3) once breaching the operational volume, the geocage function shall activate the flight termination.
Those objectives require:
a) the upload before take-off of the flight geography; and
b) the upload before take-off of the contingency volume or the operational volume, taking into account
the information provided in the manufacturer instructions.
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Achieving the first objective (1) requires:
c) the flight plan limitation (prohibition of take-off, landing, waypoints, home points or any automatic
command outside the FG).
Achieving the second objective (2) requires:
d) triggering of a caution alert when the UA breaches the limits of the FG. The caution alert could be
visual with one or more of the following: aural (sound) and/or haptic;
e) an automatic contingency manoeuvre aimed to bring back the UA inside the Flight Geography (FG).
It shall be triggered when the UA reaches the flight geography limits taking into account
positioning/accuracy errors.
Achieving the third objective (3) requires:
f) triggering of a warning alert when the UA reaches the limits of the operational volume;
g) the automatic triggering of the Flight Termination System (FTS) when the UA reaches the limits of
the operational volume as per Clause 5 “Product requirements and compliance of means to
terminate the flight for Class 6 UAS” of EN 4709-006 .
NOTE The validation of manufacturer instructions to define the ground risk buffer are considered out of the
scope of this document and are treated in EN 4709-006 FTS document.
The compliance of the geocaging function towards these requirements shall be demonstrated.
Figure 3 — Graphical representation of SORA semantic model and the geocaging function
[Source: Easy Access Rules for Unmanned Aircraft Systems, September 2022, with modifications]
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5.2 Programming the flight geography and the operational volume
5.2.1 Performance requirements
(1) The remote pilot shall be able to upload the limits of the operational volume.
(2) The remote pilot shall be able to upload the size of the contingency volume or the limits of the FG of
the intended operation.
(3) The operational volume limits shall be defined with a minimum of a single upper altitude/height
vertical limit. The vertical limit reference shall be up to the manufacturer and defined in the
manufacturer instructions, and include at least one of the following:
• altitude above mean sea level (AMSL);
• altitude defined by WGS-84 system;
• height above take-off point (ATO);
• height above ground level (AGL);
• height as the minimum Distance to Ground (DTG).
Figure 4 — Maximum height illustration, reprinted from Easy Access Rules for Unmanned Aircraft
Systems, February 2022
(4) The horizontal shape of the operational volume limits shall be defined in the manufacturer
instruction either:
a) as a circle with a minimum and maximum radius defined by the remote pilot; or
b) as a polygon with:
i. concave angles and convex angles not sharper than a value specified by the manufacturer,
ii. segments longer than the minimum defined by the manufacturer,
iii. no intersecting segments.
(5) If the UA is equipped with a geo-awareness function, the manufacturer’s instructions should
indicate the procedure for the operator to verify that the defined operational volume is compatible
with geo-awareness UAS Geographical Zone (UGZ).
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5.2.2 Verification method
(1) Verify that the UAS provides an interface to set and modify the operational volume limits and the
contingency volume.
(2) Verify that the manufacturer’s instructions include the following information:
a) maximum number of vertical limits accepted;
b) vertical limit references accepted (AMSL, WGS84, ATO, AGL, DTG);
c) horizontal shape accepted (circle, polygon):
i. where circles are an acceptable horizontal shape, then verify that the minimum and
maximum radius are provided,
ii. if polygons are an acceptable horizontal shape, then verify that the sharpest angle and
maximum number of summits are provided.
(3) Verify that the geocaging system does not accept:
d) more vertical limits than the maximum specified;
e) a horizontal circle radius greater than the maximum specified;
f) a horizontal circle radius smaller than the minimum specified;
g) sharpest horizontal angles than the maximum specified;
h) more horizontal polygon summits than the maximum specified;
i) polygon segments shorter than the minimum size specified;
j) intersecting polygon segments.
5.2.3 Pass criteria
(1) Verify that a User Interface is available to input the FG and OV.
(2) Information is available in the manufacturer’s instructions.
(3) For each case in 5.2.2((3)a) to (3)g)), an error on the User Interface is displayed.
5.2.4 Performance requirements
The geocage loading system should ensure the data loaded in the UA correspond to the limits of the FG
and OV displayed on the user interface.
(1) The display of the FG and contingency volume shall be available during the whole flight.
(2) User interface shall show that the limits loaded into the UA do not correspond to the limits on the
User Interface.
(3) User interface shall show that the limits are correctly loaded into the UA.
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(4) User interface shall show when the system is not able to upload the FG and OV limits.
(5) User interface shal
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