Which light configuration indicates inland-only pushing ahead or hip towing a fellow?

• A. Red Over Red
• B. White Over White
• C. Yellow Over Yellow
• D. Yellow Over White

Answer: (C)

On inland waterways, yellow lights are used for certain special operations to avoid confusion with the standard navigation lights. When a vessel is pushing another vessel ahead or performing hip towing, the required signal is two yellow lights in a vertical line (Yellow Over Yellow). This specific configuration tells other vessels that the vessel is engaged in pushing or towing and may not maneuver like a regular power-driven vessel, so they can take appropriate action.

The other color combinations do not indicate inland towing/pushing, so they don’t convey this particular situation.