What is the trim of a jack-up with forward draft of 11 feet and aft draft of 13.75 feet?

Correct Answer: Option C — 2.75 feet by the stern

Trim is defined mathematically as the arithmetic difference between the forward draft and the aft draft ($Trim = Draft_{aft} - Draft_{fwd}$). Calculating the given values: $13.75\text{ ft} - 11.00\text{ ft} = 2.75$ feet by the stern.