According to 33CFR, regulations pertaining to entries made in the Oil Record Book, how often must the Oil Record Book be updated with entries?

Correct Answer: Option C — Entries are to be made on each occasion when an applicable operation is performed.

33 CFR 151.25 requires that each operation involving oil or oily mixtures be recorded in the Oil Record Book immediately upon completion. This ensures real-time accountability for all machinery space operations, preventing the potential for delayed or inaccurate entries that could obscure illegal discharges or improper waste management practices.