I got my 2nd mate COC in june 2008 and I renewed it in 2013 so I got the validity till 31st Dec 2016 on COC. Due to some reasons I couldn't sail since Jan 2012 and now I wish to renew the COC to continue. I have been to MMD but due to busy schedule of concerned person I couldn't explain all. He suggested me to do phase 1 course and stcw 2010 courses and then apply for revalidation. I have doubdt that my COC will expire in Dec 2016 and I would be able to complete phase 1 course on 15th Dec 2016 and will be having little time in hand which can also be taken in doing stcw2010 courses. So after expiring COC, can I apply for revalidation. After doing phase 1 classes, can I apply for appearing in phase 1 exam after expiring of existing COC. I had all the certificates of stcw 95. Now if I go for renewal then can I go directly by refresher courses or I need to do courses of stcw2010? My certicates were issued in 2008 so completed 5 years terms.