This is an HTML version of an attachment to the Freedom of Information request 'HMAS Canberra radar intereference incident'.


OFFICIAL
DEFENCE FOI 1214/24/25
STATEMENT OF REASONS UNDER THE FREEDOM OF INFORMATION ACT 1982
1.
I refer to the request by Felix Lee (the applicant), dated and received on 7 June 2025
by the Department of Defence (Defence), for access to the following documents under 
the Freedom of Information Act 1982 (Cth) (FOI Act):
“…information regarding the radar interference incident involving HMAS Canberra 
on 4 June 2025.            
I request access to:
1. Incident Reports and Situation Summaries: Any official incident reports, internal 
situation summaries, or preliminary assessments produced concerning the radar 
interference affecting HMAS Canberra.
2. Communications: Internal emails, memoranda, or briefings exchanged referring to 
the radar interference event.
3. External Notifications: Any communications sent to or received from foreign 
governments, defence partners, or international agencies regarding the incident.
4. Technical Evaluations: Documents or analyses assessing the cause, source, or 
impact of the interference.
5. Command Decisions or Responses: Any orders, decisions, or changes in 
operational posture arising as a result of the incident.”

Background
2.
On 30 June 2025, with the applicant’s written agreement Defence extended the period 
for dealing with the request from 7 July 2025 until 21 July 2025 in accordance with 
section 15AA [extension of time with agreement] of the FOI Act. 
FOI decision maker
3.
I am the authorised officer pursuant to section 23 of the FOI Act to make a decision on 
this FOI request.
Documents identified
4.
I identified documents as falling within the scope of the request. 
Exclusions
5.
Personal email addresses, signatures, PMKeyS numbers and mobile telephone 
numbers contained in documents that fall within the scope of the FOI request, 
duplicates of documents, and documents sent to or from the applicant are excluded 
from this request. Defence has only considered final versions of documents.
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Decision 
6. 
I have decided to refuse access to the documents on the grounds that the information is 
considered exempt under sections 47C [Public interest conditional exemptions – 
deliberative processes] and 47E [Public interest conditional exemptions – certain 
operations of agencies] of the FOI Act. 
Material taken into account 
7. 
In making my decision, I have had regard to: 
a.  the terms of the request; 
b.  the content of the identified documents in issue; 
c.  relevant provisions of the FOI Act;  
d.  the Guidelines published by the Office of the Australian Information 
Commissioner under section 93A of the FOI Act (the Guidelines); and 
e.  advice provided from relevant personnel within the Royal Australian Navy. 
REASONS FOR DECISION 
Section 22 – Access to edited copies with exempt or irrelevant matter deleted 
8. 
Where a decision maker denies access to a document, section 22(1) of the FOI Act 
requires that they consider releasing the document with exempt matter deleted, if 
possible. 
9. 
Paragraph 3.98 of the Guidelines provides that: 
…an agency or minister should take a common sense approach in considering 
whether the number of deletions would be so many that the remaining 
document would be of little or no value to the applicant. 

10. 
 I have decided to refuse access to the documents as they would be meaningless and of 
little or no value once the exempt material is removed. 
Section 47C – Public interest conditional exemptions - deliberative processes 
11. 
Section 47C(1) of the FOI Act states: 
(1) A document is conditionally exempt if its disclosure under this Act would 
disclose matter (deliberative matter) in the nature of, or relating to, opinion, 
advice or recommendation obtained, prepared or recorded, or consultation 
or deliberation that has taken place, in the course of, or for the purposes of, 
the deliberative processes involved in the functions of: 

(a) an agency; or 
(b) a Minister; or 
(c)  the Government of the Commonwealth. 

12. 
Paragraph 6.91 of the Guidelines provides that the conditional exemption must only 
apply where the potential effect following disclosure is expected to ‘be both 
substantial and adverse.’ 
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13. 
Following a review of the documents, I identified deliberative matter – that is, content 
that is in the nature of, or relating to either opinion, advice or recommendation that has 
been obtained, prepared or recorded; or a consultation or deliberation that has taken 
place, in the course of, or for the purpose of, a deliberative process of Defence. 
14. 
I have considered the extent to which any of the deliberative processes within the 
specified material may already be in the public domain.  
15. 
Section 47C(2)(b) of the FOI Act provides that deliberative matter does not include 
purely factual material. The Guidelines, at paragraph 6.70, state that: 
[p]urely factual material’ does not extend to factual material that is an integral 
part of the deliberative content and purpose of a document, or is embedded in or 
intertwined with the deliberative content such that it is impractical to excise it.
 
16. 
Due to the currency of the subject matter (in that certain aspects of the subject matter 
have not yet been settled or remain open for consultation), I am of the opinion that the 
identified information would reveal deliberative processes of Defence. Accordingly, I 
find that the identified documents contain deliberative matters which is conditionally 
exempt under section 47C(1) of the FOI Act. 
Section 47E(d) – Public interest conditional exemptions – certain operations of agencies  
17. 
Section 47E(d) of the FOI Act states: 
A document is conditionally exempt if its disclosure under this Act would, or 
could reasonably be expected to, do any of the following:  

(d) have a substantial adverse effect on the proper and efficient conduct of the 
operations of the agency. 
18. 
The Guidelines, at paragraph 6.115, provide that: 
  The predicted effect must bear on the agency’s ‘proper and efficient’ 
operations, that is, the agency is undertaking its operations in an expected 
manner.
 
19. 
I find that the material specified relates to the investigation of specific incident that is 
currently under investigation.  
20. 
Releasing information, that has not yet been formalised could reasonably be expected 
to have a substantial adverse effect on Defence’s management of current and future 
reported incidents. Maintaining the integrity of investigations and the ability for 
individuals to provided information freely is paramount. Releasing details about the 
incident those involved could adversely affect Defence’s ability to conduct future 
investigations and directly affect the proper and efficient conduct of the operations of 
the agency. In this instance the proper and efficient conduct of the operations of the 
RAN. 
21. 
The documents also contain the names and contact details of Defence personnel 
beyond those subject to the investigations. I am satisfied there is a reasonable 
expectation that the names and contact details of Defence personnel could be used 
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inappropriately, in a manner which adversely affects the health, wellbeing, and work 
of Defence personnel. 
22. 
Accordingly, I am satisfied that the information is conditionally exempt under section 
47E(d) of the FOI Act. 
Public interest considerations - sections 47C 
23. 
Section 11A(5) of the FOI Act states: 
The agency or Minister must give the person access to the document if it is 
conditionally exempt at a particular time unless (in the circumstances) 
access to the document at that time would, on balance, be contrary to the 
public interest.  

24. 
I have considered the factors favouring disclosure as set out in section 11B(3) [factors 
favouring access] of the FOI Act. The relevant factors being whether access to the 
document would: 
(a) promote the objects of this Act (including all the matters set out in 
sections 3 and 3A); 

(b) inform debate on a matter of public importance; 
(c) promote effective oversight of public expenditure; 
(d) allow a person to access his or her own personal information. 
25. 
In my view, disclosure of this information would not increase public participation in 
the Defence process (section 3(2)(a) of the FOI Act), nor would it increase scrutiny or 
discussion of Defence activities (section 3(2)(b) of the FOI Act). 
26. 
Paragraph 6.233 of the Guidelines specifies a non-exhaustive list of public interest 
factors against disclosure. The factors I find particularly relevant to this request are 
that release of this information could reasonably be expected to prejudice:  
x  the protection of an individual’s right to privacy;  
x  the interests of an individual or a group of individuals; 
x  an agency’s ability to obtain confidential information; 
x  an agency’s ability to obtain similar information in the future; 
x  the management function of an agency; and 
x  the personnel management function of an agency. 
27. 
I have not taken any of the factors listed in section 11B(4) [irrelevant factors] of the 
FOI Act into account when making this decision.  
28. 
I am satisfied, based on the above particulars, the public interest factors against 
disclosure outweigh the factors for disclosure, and that, on balance, it is against the 
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public interest to release the information to you. Accordingly, I find that the 
information is exempt under sections 47C and 47E(d) of the FOI Act. 
 
 
 
Digitally signed by 
Anita 
Anita WILLIAMS 1 
WILLIAMS 1 Date: 2025.07.15 
14:50:38 +10'00'
CDRE Anita Williams, CSC, CSM, RAN 
Accredited Decision Maker 
Navy 
Department of Defence 
OFFICIAL