Generally, no. FR 3 applies to government servants whose *conditions of service* are governed by Marine Regulations. If you are a civilian employee, even working in a marine environment, and your service conditions are not specifically governed by Marine Regulations, then the FR&SR likely apply to you.
Source: FRSR Rule 3
Where can I find the updated rules after cancellation of F.R. 41, 42 and 43?
Is personal pay considered part of my basic pay?
What if the foreign employer fails to pay the agreed-upon contributions?
What happens if I take leave but continue to do some work for the organization I am deputed to?
Who sets the rules under FR 47?
This answer is for informational purposes only and does not constitute legal advice. Always refer to the original rules and consult competent authorities for official interpretation.