This mock exam question from the hong kong marine department marksheet says option A is correct, however i think option A would cause a collision.
Refering to all of the materials i have, I feel this scenario is as follows: A vessel directly ahead is underway and making way but its getting closer. The stern of the appraching vessel would be on my starboard bow.
If the boat has approached from the starboard side then it is a crossing situation and i would be the give-way vessel, making one short blast and turning to starboard. Option B
Alternatively, as the vessel is "right ahead" and underway, I could also pass on the stern of the vessel if i were to slow down and let her pass, option D.
why would A be the correct answer given this scenario? and assuming the marksheet is incorrect, could both Option B AND D both be correct?