Final answer:
AA&E security surveys on ships must be conducted every 12 months and records should be maintained for 3 years for review during various inspections.
Step-by-step explanation:
For activities conducted on ships, AA&E security surveys need to be conducted every 12 months. Similarly, records for these surveys must be maintained for a period of 3 years for review during assistance visits, command inspections, and explosive safety inspections. This ensures that proper security measures are in place and any potential risks are identified and addressed.