kSIST FprEN 4709-005:2025
(Main)Aerospace series - Unmanned Aircraft Systems - Part 005: Verification method for the Geocaging function
- Abstract
This document specifies requirements, test methods and pass criteria for the:
— implemented static 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.
This document does not cover the dynamic geocage function.
In addition, this document only covers the termination of the flight of the UA by the geo-caging function when breaching the OV. It does not address the compliance to the technical requirements imposed by Regulation (EU) 2019/945 on the Flight Termination System which are fully addressed by standard EN 4709-006, including the automatic triggering of the termination performed independently from the geo-caging function.
- Status
- Not Published
- Public Enquiry End Date
- 07-Nov-2023
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 5020 - Formal vote (FV) (Adopted Project)
- Start Date
- 30-Jan-2025
- Due Date
- 20-Mar-2025
- Completion Date
- 30-Jan-2025
kSIST FprEN 4709-005:2025 is a SIST standard in the Aerospace series for Unmanned Aircraft Systems. It specifies requirements, test methods and pass criteria for the geocaging function that keeps a Unmanned Aircraft (UA) inside the planned flight geography and operational volume, and for the manufacturer instructions that describe that function and its limits. The document supports manufacturers, importers, distributors, conformity assessment bodies and operators who need a common way to verify containment and related flight-termination behavior.
What does kSIST FprEN 4709-005:2025 specify?
kSIST FprEN 4709-005:2025 covers the implemented static geocage function and the information needed to use it correctly. It also covers the geocage-driven flight termination action when the UA breaches the operational volume.
The scope is limited in two important ways. It does not cover the dynamic geocage function, and it only addresses flight termination triggered by geocaging. The separate technical requirements for the Flight Termination System (FTS) are covered by EN 4709-006, including the automatic triggering of termination that happens independently from the geocaging function.
The introduction also places the document in context:
- it supports SORA Step #9 containment, also called standard containment;
- it is not a complete means of compliance to that SORA step because it does not include design requirements.
The document is organized into these main parts:
- Clause 1 - Scope
- Clause 2 - Normative references
- Clause 3 - Terms and definitions
- Clause 4 - List of abbreviated terms
- Clause 5 - Geocaging function requirements
- Clause 6 - Geocaging information requirements
- Annex ZA - relationship with Regulation (EU) 2019/945
What are the key requirements of kSIST FprEN 4709-005:2025?
The core idea of kSIST FprEN 4709-005:2025 is simple: the geocaging function must keep the UA inside the flight geography in normal use, bring it back if it leaves that area, and trigger flight termination if it reaches the operational volume boundary. The standard then defines how to configure, verify and document that behavior.
Programming the flight geography and operational volume
Clause 5.2 requires the remote pilot to be able to upload the operational volume limits and either the contingency volume or the flight geography limits before take-off. The vertical boundary must include at least one upper height or altitude reference, chosen by the manufacturer, such as AMSL, WGS-84, ATO, AGL or DTG.
The horizontal boundary must be defined either as:
- a circle with minimum and maximum radius, or
- a polygon with limits on angle sharpness, segment length and segment intersections.
In practice, this means the geocaging user interface must accept only the forms and sizes the manufacturer allows, and it must reject values outside those limits. If the UA has a geo-awareness function, the manufacturer instructions should also tell the operator how to check compatibility with a UAS Geographical Zone (UGZ).
Clause 5.2 also checks loading behavior. The UI must show whether the limits have been loaded, whether they were loaded correctly, and when loading is not possible. It must also show an alert if a flight is started without loaded limits.
Limiting the flight plan
Clause 5.3 prevents the operator from building a flight plan that starts, ends or navigates outside the flight geography. Take-off outside the flight geography, waypoints outside it, a home position outside it and a landing position outside it are all blocked.
This matters because the geocaging function is not only a geofence during flight - it also acts before flight by preventing an invalid plan from being set. Clause 5.3 also requires the system to reject changes to the FG/OV while in flight, and it defines bench, ground and flight tests to prove that behavior.
For verification, the clause requires repeated tests and traceable records with date, time and results. If a test fails, the failure must be recorded, analyzed and solved before the test series is restarted.
Keeping the UA inside the flight geography
Clause 5.4 requires the geocaging function to start an automatic contingency manoeuvre when the UA breaches the flight geography, in automatic, semi-automatic or manual modes. The point is to keep the UA within the operational volume under normal conditions, even if it briefly crosses the flight geography boundary.
The clause also requires a caution alert when the UA enters the contingency volume. The alert must be visual on the Command Station and may also be aural or haptic. For verification, the standard uses flight tests, including cases with horizontal limits, vertical limits, sharp polygon angles and automatic return-to-home behavior.
The test method relies on position measurement:
- horizontal position is measured using GNSS, with guidance from EN 4709-001;
- vertical position is measured with sensors inside the UA, depending on the vertical reference used.
Clause 5.4 also requires the tests to consider positioning and accuracy errors, response time, wind, flight speed and override capability. The pass criteria require repeated successful activations and evidence that the UA returns to the flight geography within the defined envelope.
Triggering flight termination at the operational volume
Clause 5.5 requires the FTS to be triggered automatically when the UA reaches the horizontal or vertical limits of the operational volume. It also requires a warning alert to the remote pilot at that point.
The verification method is a flight test, preferably in VLOS over a controlled ground area. The clause allows non-destructive testing, including digital recording of the FTS signal, and it points to EN 4709-006 for the minimum number of tests. The practical meaning is that geocaging must not stop at warning or contingency behavior - it must also be able to activate the flight termination action at the OV boundary.
What the manufacturer must explain
Clause 6 requires the manufacturer instructions to describe how the user interface works, what happens when the OV is breached, and how the automatic contingency manoeuvre behaves. That includes the horizontal and vertical manoeuvres and any remote pilot override capability.
The instructions must also provide typical and worst-case horizontal and vertical manoeuvre spans, position accuracy and standard deviation, reaction time, and a summary table of distances travelled in typical and worst-case conditions. Those values are what the operator uses to size the contingency volume in a way that matches the actual UAS performance and the operating conditions.
What terms does kSIST FprEN 4709-005:2025 define?
- Flight geography (FG) - the airspace volume or volumes in which the UAS operator plans to conduct normal operations.
- Operational volume (OV) - the combination of the flight geography and the contingency volume.
- Contingency volume - the airspace outside the flight geography where contingency procedures apply.
- Caution alert - an alert that requires immediate awareness and a subsequent response from the remote pilot; here it is linked to breach of the flight geography.
- Warning alert - an alert that requires immediate awareness and immediate response from the remote pilot; here it is linked to breach of the operational volume.
- Flight Termination System (FTS) - the system that terminates flight when triggered, as referenced by EN 4709-006.
- Global Navigation Satellite System (GNSS) - the satellite-based positioning system used to measure horizontal position.
- UAS Geographical Zone (UGZ) - an airspace portion established by the competent authority to facilitate, restrict or exclude UAS operations for safety, privacy, data protection, security or environmental reasons.
Who uses kSIST FprEN 4709-005:2025?
kSIST FprEN 4709-005:2025 is written for economic operators that need a common verification method. The introduction explicitly names manufacturers, importers, distributors, their trade associations, and bodies involved in conformity assessment procedures.
In practice, it is also used by:
- UAS design and verification teams, to build and test geocaging functions;
- quality and compliance teams, to document the test evidence;
- operators and remote pilots, to configure FG, OV and contingency volume before flight;
- test labs and conformity assessors, to run bench, ground and flight tests;
- buyers and system integrators, to check whether a UAS supports the containment behavior they need.
Which standards are used with kSIST FprEN 4709-005:2025?
- EN 4709-001 - provides product requirements and verification, and it is the base source for terms and GNSS guidance used in the geocaging tests.
- EN 4709-006 - covers means to terminate flight, including the technical requirements and verification for the FTS.
- EN 4709-007 - provides general product requirements for UAS classes C5 and C6, including how FG, contingency volume and OV limits are displayed on the user interface.
What does the kSIST FprEN 4709-005:2025 document contain?
The document contains requirement clauses, verification methods and pass criteria for geocaging configuration, flight plan limitation, containment behavior and FTS triggering. Clause 6 then turns those requirements into the information that must appear in the manufacturer instructions, including manoeuvre spans, reaction time and the summary table for contingency volume sizing.
It also contains a set of figures that illustrate the SORA semantic model and the test cases for horizontal limits, vertical limits, sharp angles and return-to-home behavior. Those figures support the flight-test procedures, but the actual test logic is written in the clauses.
Annex ZA gives the correspondence with Regulation (EU) 2019/945 for class C6 unmanned aircraft systems. The bibliography points to EN 4709-003, Commission Implementing Regulation (EU) 2019/947, and the Easy Access Rules for Unmanned Aircraft Systems.
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Frequently Asked Questions
kSIST FprEN 4709-005:2025 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Unmanned Aircraft Systems - Part 005: Verification method for the Geocaging function". This standard covers: This document specifies requirements, test methods and pass criteria for the: — implemented static 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. This document does not cover the dynamic geocage function. In addition, this document only covers the termination of the flight of the UA by the geo-caging function when breaching the OV. It does not address the compliance to the technical requirements imposed by Regulation (EU) 2019/945 on the Flight Termination System which are fully addressed by standard EN 4709-006, including the automatic triggering of the termination performed independently from the geo-caging function.
This document specifies requirements, test methods and pass criteria for the: — implemented static 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. This document does not cover the dynamic geocage function. In addition, this document only covers the termination of the flight of the UA by the geo-caging function when breaching the OV. It does not address the compliance to the technical requirements imposed by Regulation (EU) 2019/945 on the Flight Termination System which are fully addressed by standard EN 4709-006, including the automatic triggering of the termination performed independently from the geo-caging function.
kSIST FprEN 4709-005:2025 is classified under the following ICS (International Classification for Standards) categories: 03.220.50 - Air transport; 49.020 - Aircraft and space vehicles in general. The ICS classification helps identify the subject area and facilitates finding related standards.
kSIST FprEN 4709-005:2025 is associated with the following European legislation: EU Directives/Regulations: 2019/945; Standardization Mandates: M/567. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
kSIST FprEN 4709-005:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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.
oSIST prEN 4709-005:2023
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
oSIST prEN 4709-005:2023
prEN 4709-005:2023 (E)
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.
oSIST prEN 4709-005:2023
prEN 4709-005:2023 (E)
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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prEN 4709-005:2023 (E)
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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prEN 4709-005:2023 (E)
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.
oSIST prEN 4709-005:2023
prEN 4709-005:2023 (E)
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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prEN 4709-005:2023 (E)
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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prEN 4709-005:2023 (E)
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
...