How can flares be used as distress signals during nighttime?

Flares are an essential distress signal used to attract attention during nighttime situations. The proper method of using flares is to fire them into the air to create a bright, visible signal that can be seen from a distance. This method effectively alerts nearby vessels, aircraft, or rescue teams that assistance is needed.

When fired into the air, flares can light up the sky and provide a clear visual cue, making it much easier for others to locate the source of the signal. This is crucial during nighttime when visibility is significantly reduced, and other means of signaling may not be effective.

Other methods mentioned, such as holding flares at the side of the vessel or lighting them on the deck, would not achieve the same level of visibility or effectiveness in signaling for help. Dropping flares in the water may also not provide the necessary visibility needed to attract attention, which underlines the importance of firing flares into the air as the correct method.