How can you effectively signal for attention from ships or aircraft?

Using flares is the most effective method for signaling for attention from ships or aircraft in emergency situations. Flares are specifically designed as distress signals and can be seen from great distances, both during the day and at night. Their bright colors and intense light draw immediate attention, making them a reliable option for signaling for help.

While waving your arms may attract some attention, it is far less effective in situations where visibility is limited or from long distances. Blowing a conch shell might produce sound but lacks the visual impact needed to alert nearby vessels or aircraft effectively. Writing in the sand can only be seen from an aerial view and is not a reliable method for attracting attention, particularly if the area is not heavily trafficked or observed from above. Therefore, using flares is recognized as the best practice for emergency signaling due to their visibility and effectiveness.