By day, when it is impracticable for a small vessel engaged in diving operations to display the shapes for a vessel engaged in underwater operations, she shall display

By day, when it is impracticable for a small vessel engaged in diving operations to display the shapes for a vessel engaged in underwater operations, she shall display

• A. A white flag
• B. A red flag
• C. A blue flag
• D. A rigid replica of the International Code flag \"A\"

Answer: (D)

When signaling diving operations during the day, vessels normally display specific day shapes to indicate underwater work. If it’s impracticable to show those shapes, the rule allows a substitute: a rigid replica of the International Code flag Alfa. This flag communicates to other vessels that divers are in the water and that they should keep well clear and proceed with caution at reduced speed. The Alfa signal is a standardized way to convey this situation when flying or displaying the standard day shapes isn’t feasible. The other flags listed don’t carry this specific, recognized message for diving operations, so the rigid Alfa flag replica is the correct substitute.

When signaling diving operations during the day, vessels normally display specific day shapes to indicate underwater work. If it’s impracticable to show those shapes, the rule allows a substitute: a rigid replica of the International Code flag Alfa. This flag communicates to other vessels that divers are in the water and that they should keep well clear and proceed with caution at reduced speed. The Alfa signal is a standardized way to convey this situation when flying or displaying the standard day shapes isn’t feasible. The other flags listed don’t carry this specific, recognized message for diving operations, so the rigid Alfa flag replica is the correct substitute.