At night, what lighting indicates a push towing vessel?

The indication of a push towing vessel at night is represented by displaying two yellow lights vertically. This lighting configuration is designed to make the vessel easily identifiable to other mariners, helping to ensure safe navigation in congested or limited visibility environments. The yellow lights specifically indicate that the vessel is engaged in pushing, as opposed to towing, which often has different lighting requirements. This recognition is crucial for ensuring that other vessels maintain proper clearance and conduct themselves safely around such vessels engaged in pushing operations.

The other lighting combinations mentioned are used for different types of vessels or configurations, helping to facilitate maritime safety by ensuring that all vessels can be correctly identified at night.