Question 3850 Deck General

The correct answer is C) three years. The Oil Record Book must be maintained on board a MODU (Mobile Offshore Drilling Unit) for a period of three years as per the regulations set forth by the International Convention for the Prevention of Pollution from Ships (MARPOL). This requirement ensures that the detailed record of oil and oily waste operations can be inspected and verified by authorities over a reasonable time frame. The other options are incorrect because one year (A) is too short a time period, and two years (B) and four years (D) do not align with the three-year retention requirement specified in the MARPOL regulations.