What vessel is required to carry an efficient daylight signaling lamp when on an international voyage?

The requirement for vessels on international voyages to carry an efficient daylight signaling lamp is specifically aimed at ensuring safety and communication in various maritime conditions. The correct vessel type that must adhere to this rule is passenger ships over 200 gross tons. This regulation is essential because larger passenger vessels have significant passenger loads and are subject to stricter safety measures. The efficient daylight signaling lamp plays a crucial role in improving visibility and communication during the day, particularly in busy shipping lanes where the risk of collisions may be higher.

While other options may include vessels that are important for safety, like fishing boats and tow boats, they might not have the same stringent international signaling requirements directed toward passenger vessels. This focus on larger passenger ships helps to facilitate safe sea travel and enhance emergency preparedness for avoiding potential accidents at sea.