In accordance with the international MARPOL Annex VI regulations, in the absence of an exhaust gas cleaning system, what is the maximum allowable sulphur content for a fuel to be burned while the ship is operating in an emissions control area?

Correct Answer: Option A — 1.5%

MARPOL Annex VI, Regulation 14, established historical limits for sulfur content in fuel oil used within Emission Control Areas (ECAs). While current limits are significantly lower (0.10%), the 1.5% threshold represents the regulatory standard referenced in historical examination materials for ships operating outside of current ultra-low sulfur requirements.