If you completed a Revalidation course to revalidate your certificate last time, you are able to complete the course again for a second or subsequent time, however you will also need to have a minimum of 28 DP sea time days.
This DP time may be completed prior to or after the Revalidation Course, however they must be gained whilst your certificate is still valid.
If you subsequently revalidate after taking the course by completion of the full sea time requirement of 150 DP sea time days, you will then be able to take the Revalidation Course again without a DP sea time requirement.
Charlotte Brolly