The following resources for cybersecurity training may help you build knowledge in both general IT security and security challenges unique to the maritime domain.

• CISA Cybersecurity Training – U.S. Cybersecurity and Infrastructure Security Agency offers free courses and webinars on cybersecurity fundamentals, incident response, and emerging threats.
• Cybrary Free Courses – Introductory classes on network defense, ethical hacking, and secure coding practices.
• Open University: Introduction to Cyber Security – A free course covering core principles of information security.
• edX Cybersecurity Courses (Free Audit)
• SANS Cyber Aces – Free foundational training in operating systems, networking, and system administration from a security perspective.

• IMO Cyber Risk Management – Guidance from the International Maritime Organization on managing cyber risk in shipping.
• Maritime Cyber Alliance Resources – Industry reports, case studies, and threat briefings.
• Maritime Cybersecurity Center – Knowledge hub for cyber risk in shipping, ports, and offshore sectors.
• US Coast Guard Cyber Awareness Training (PDF) – U.S. Coast Guard training material on protecting vessel and facility systems.
• NIST Cybersecurity for OT and Critical Infrastructure – While not maritime-specific, this framework is useful for industrial control and shipboard automation systems.

CI Security:

• https://www.cisecurity.org/

IMO

• http://www.imo.org/en/ourwork/security/guide_to_maritime_security/pages/cyber-security.aspx
• https://www.imo.org/en/OurWork/Security/Pages/Cyber-security.aspx

ICS

• http://www.ics-shipping.org/docs/default-source/resources/safety-security-and-operations/guidelines-on-cyber-security-onboard-ships.pdf?sfvrsn=16
• https://advisera.com/27001academy/blog/2017/04/24/how-iso-27001-can-help-suppliers-comply-with-usa-dfars-7012/

NIST

• https://nvd.nist.gov/800-53
• https://nvlpubs.nist.gov/nistpubs/specialpublications/nist.sp.800-171r1.pdf

Trusted CI

• https://trustedci.org/

MISC

• LAN security: https://en.wikipedia.org/wiki/IEEE_802.1X
• U.S. ARF Maritime Cybersecurity Resources https://satnag.unols.org/cybersec/index.html