What indicates the scuba diving or snorkeling activity?

Scuba diving and snorkeling activities are indicated by the presence of specialized equipment such as masks, fins, snorkels, and tanks for scuba divers. Look for signs of underwater exploration, like buoyancy control devices and dive flags. Additionally, popular diving spots often feature guided tours, dive shops, and safety briefings. Clear water, coral reefs, and marine life are also common indicators of these activities.