Which statement is true concerning a vessel equipped with operational radar?

The statement that a vessel equipped with operational radar must use this equipment to obtain early warning of risk of collision is accurate because radar serves as a critical tool for collision avoidance. By using radar, the operator can detect other vessels and navigate hazards, thus enhancing situational awareness in both visibility and non-visibility conditions. While radar can provide valuable information, it is essential for operators to remain vigilant and continuously monitor their surroundings, especially in busy waterways.

Other options, while touching on aspects of radar use, do not reflect best practices or regulations. For instance, while radar enhances safety in restricted visibility, it is not exclusively required to be used only in those conditions, as proper use is beneficial in all scenarios. Additionally, having radar does not negate the need for a look-out; maintaining a proper look-out is a fundamental rule of safe navigation. Lastly, the safe speed of a vessel is influenced by various factors, not solely by whether radar is onboard, so it cannot be assumed that a vessel with radar can safely travel at a greater speed than one without it.