BOTH INTERNATIONAL & INLAND Which light(s) shall a towing vessel pushing a barge ahead and rigidly connected in a composite unit show?

Correct Answer: Option B — the lights required of a power-driven vessel, not towing

Rule 24(b) states that a power-driven vessel and a vessel being pushed ahead, when rigidly connected in a composite unit, shall be regarded as a power-driven vessel and exhibit the lights prescribed in Rule 23. This treats the entire assembly as a single power-driven vessel, not a towing vessel.