Section 315(2) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(2)If a sailor is considered to be deserving of the Medal, the Captain when recording the award of the 16th successive "Very Good" character on the Service Certificate shall also record the recommendation on the sailor's Service Certificate in the appropriate column by the notation "R.M.M." (Recommended for Meritorious Service Medal).