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Security report for sonardyne.com

Sonardyne · Technology · United Kingdom

Medium risk. 5 critical or high findings in Security headers and SSL/TLS.

Security score

67/100

Risk levelMedium

0–100, higher is better. How it is calculated

Sonardyne is a well-established company specializing in underwater technology with over 50 years of experience. The company offers a broad range of products and services including underwater positioning, navigation, monitoring, communications, marine robotics, and custom engineering solutions primarily targeting energy, defense, and ocean science sectors. The website reflects a professional and comprehensive digital presence with clear branding and detailed content about their expertise and product offerings. Technically, the site is built on WordPress with modern SEO and analytics tools integrated, providing a good user experience and mobile optimization. Security posture is solid with HTTPS and cookie consent mechanisms, though explicit security headers and incident response contacts could be improved. The absence of WHOIS domain registration data is a notable transparency gap, but the overall business credibility remains high based on website content and corporate affiliations. Strategic recommendations include enhancing security headers, publishing vulnerability disclosure information, and improving contact information visibility to strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

5 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1
    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

Need hands-on remediation? Email guard@offseq.com

Keep watching sonardyne.com

This scan found 25 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

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Full report

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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
57
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
83
Average
67

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Sonardyne holds a strong market position as a leader in underwater technology, supported by its parent company Covelya Group and sister companies. Its business model focuses on B2B sales of precision instruments and technology services for marine and offshore industries. The company targets industrial clients in energy, defense, and scientific research, leveraging a diversified product portfolio and service offerings. The website content and structure indicate a mature digital marketing approach with integrated analytics and consent management. Growth indicators include sustainability achievements and active engagement in corporate governance. The partnership ecosystem is robust, with multiple sister companies under the Covelya umbrella, enhancing market reach and innovation capabilities.

Security posture

The website demonstrates a moderate to good security maturity level with enforced HTTPS and cookie consent compliance. However, the lack of explicit security headers such as Content-Security-Policy and X-Frame-Options represents an area for improvement. No vulnerabilities or exposed sensitive data were detected in the HTML content. The absence of a security.txt file or clear incident response contact information limits transparency and readiness for vulnerability reporting. Compliance with GDPR is indicated through privacy and cookie policies. Overall, the security posture is adequate for a corporate website but could be enhanced by adopting additional best practices and improving incident response visibility.

Recommendations

  1. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  2. Publish a security.txt file to facilitate vulnerability disclosure and improve transparency.
  3. Enhance visibility of contact information, including dedicated security and incident response contacts.
  4. Regularly audit and update third-party scripts to mitigate potential vulnerabilities.
  5. Continue to monitor and improve privacy compliance and cookie consent mechanisms.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Sonardyne
Description
Sonardyne have been engineering the future of underwater technology for over 50 years. Track, monitor, image, survey, navigate.
Key services
Underwater positioning, Navigation, Monitoring, Communications, Mooring & release, Marine robotics, Custom engineering, Training, Support services
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, Yoast SEO, jQuery, Google Analytics, Google Tag Manager, Mouseflow, CookieYes, Alpine.js, Swiper, Magnific Popup, Select2, Jarallax
Frameworks
WordPress
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism
  • No exposed sensitive data in HTML
  • Use of Google Tag Manager and analytics scripts asynchronously

Analytics and tracking

Services
Google Analytics, Microsoft Clarity, Mouseflow
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Microsoft Clarity, Mouseflow
Marketing tools
CookieYes
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and navigation
  2. Strong focus on underwater technology and engineering
  3. Comprehensive cookie consent and privacy mechanisms implemented
  4. No direct contact emails or phone numbers found on homepage
  5. Use of multiple analytics and tracking tools with consent
  6. No visible security.txt or explicit vulnerability disclosure
  7. WHOIS data unavailable, which is unusual and reduces transparency
Technical notes

Notes

The website is built on WordPress CMS with a modern tech stack including jQuery, Alpine.js, and various UI libraries such as Swiper and Magnific Popup. SEO is managed via Yoast SEO plugin, and analytics are implemented through Google Analytics, Microsoft Clarity, and Mouseflow. The site loads asynchronously for performance optimization and includes mobile-responsive design. While the hosting provider is not explicitly identified, the use of Google Tag Manager and CDN-hosted scripts suggests a professional hosting environment. Performance is moderate with room for optimization. Accessibility features are present but could be further enhanced. Overall, the technical infrastructure supports a robust and user-friendly digital presence with opportunities for modernization and security hardening.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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