COMM-END-L4.1

Validity and revalidation

COMM-END-M4 · Keeping it and moving on · COMM-END-M4-A Five-year validity and 150-day revalidation, and the step from an endorsed Yachtmaster to an MCA yacht CoC.

The endorsement lasts five years at most, and only while your medical is in date. **Revalidation needs 150 days' sea service**, so log your days as you go.

Independent study. xplor is not an accredited training provider and awards no certificate or Certificate of Competency. The commercial endorsement is issued only by the RYA on application with the required certificates and medical, and the qualifying RYA certificate must be earned at a recognised training centre. AI-drafted content pending subject-matter-expert review.