To stay protected, the International Maritime Organization (IMO) recommends that vessels introduce cyber security plans no later than the first annual renewal of the company ISM Document of Compliance after 1 January 2021.

The Guide's five functions are:

#1 Identify: Which systems are the vulnerable ones, which systems are vital to operations and who is responsible for them.

#2 Protect: The plan should define measures to prevent attacks from occurring.

#3 Detect: If an attack happens, recognize it quickly and mitigate the damage.

#4 Respond: Plan a clear means of getting back up and running as quickly as possible using a second system.

#5 Recover: Get the primary system back running and analyze the cause.


Concluding, to learn more see the interactive guide here.