What is often included in the required safety equipment on a commercial vessel?

Flares are an essential component of the required safety equipment on a commercial vessel because they serve as a critical means of signaling for help in emergency situations. These devices can be visually or audibly detected by other vessels and search and rescue teams, making them invaluable for locating a distressed vessel, particularly in conditions where visibility may be poor or when electronic communications fail.

While GPS devices enhance navigation and can assist in safety, they are not typically classified as a mandatory safety item. Sails and fishing gear may be relevant for specific types of vessels but do not contribute to emergency signaling or safety equipment requirements. Therefore, flares are the correct response as they meet established safety regulations and standards for commercial maritime operations.