BOTH INTERNATIONAL & INLAND There are two classes of vessels which, to the extent necessary to carry out their work, do not have to comply with the rule regarding traffic separation schemes. One of these is a vessel __________.

Correct Answer: Option D — servicing a submarine cable

Under Inland Navigation Rules, for the condition where 'There are two classes of vessels which, to the extent necessary to carry out their work, do not have to comply with the rule regarding traffic separation schemes. One of these is a vessel', the correct requirement is: 'servicing a submarine cable'. This standard ensures clear navigational intent and collision avoidance.