United States Coast Guard Captains License Practice Exam 2026 – Comprehensive All-in-One Guide for Exam Success!

The configuration that best describes a sailing vessel that is also using its engine is a black cone below a white light. According to the navigation rules, when a sailing vessel is underway under power (using its engine), it must exhibit specific day shapes and lights. The black cone signifies that the vessel is not under sail alone and is instead utilizing mechanical propulsion. The white light indicates the presence of a power-driven vessel, which is consistent with operating under engine power. This configuration effectively communicates to other vessels that the sailing vessel is currently navigating using its engine, ensuring safe passage and awareness on the water.