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The statement that a vessel equipped with operational radar must be used to obtain early warning of the risk of collision is accurate because radar is a crucial navigation aid that enhances situational awareness, particularly in identifying other vessels and hazards. The primary purpose of radar in maritime navigation is to detect nearby objects, allowing mariners to assess potential collision risks well in advance.

This fundamental principle aligns with the rules of the road, which emphasize the importance of proactive measures for avoiding collisions. While radar is especially beneficial in conditions of restricted visibility, which can include fog, heavy rain, or darkness, it is not limited to use only in these situations. It should be consistently utilized whenever possible to enhance safety and navigation.

By relying on radar for early warnings, vessel operators can make informed decisions and take necessary actions to avoid collisions, making it an invaluable component of modern maritime operations.