BOTH INTERNATIONAL & INLAND Which equipment, to generate fog signals, is required on a vessel 20 meters in length?

Correct Answer: Option A — Whistle and bell only

Rule 33 requires vessels 12 meters or more in length to carry a whistle and a bell. Vessels 100 meters or more must also carry a gong. Since this vessel is 20 meters, it falls within the 12-to-100-meter category, necessitating only the whistle and the bell for sound signaling.