Section 350(c) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(c)an aggregate period of three months sea training for Indian Naval Reserve Officers and of six months sea training for Indian Naval Volunteer Reserve Officers who are required to obtain a Naval Watchkeeping Certificate before promotion to the rank of Lieutenant-Commander, and an aggregate period of six months training to obtain an Engine-Room Watchkeeping Certificate before promotion to the rank of Lieutenant-Commander in the Engineering Branch.
