What shape(s) would a towing vessel less than 200 meters in length and restricted in her ability to deviate from her course display by day?

A towing vessel that is less than 200 meters in length and restricted in her ability to deviate from her course follows the guidelines established in the International Regulations for Preventing Collisions at Sea (COLREGS). According to these regulations, such a vessel must display the day shapes of a ball-diamond-ball.

The ball shape indicates that the vessel is a towing vessel, signifying her function and alerting other vessels to the fact that she is engaged in towing. The diamond in the center signifies that she is restricted in her ability to maneuver, indicating that her path and ability to change course are limited. This combination is essential for other vessels to understand the towing vessel's current situation and navigation status.

The other options do not represent the correct shapes required under the COLREGS for this specific type of vessel. The day shapes must accurately convey the vessel's operational status to ensure safe navigation and collision avoidance at sea.