Portable Surface Supplied Diving Systems Practice Test 2025 (MK-20/KM-37) – Your All-in-One Guide to Exam Success!

Utilizing flashlights and avoiding stirring up sediment is a practical approach to improving underwater visibility during a dive. Flashlights can enhance visibility by illuminating dark areas, making it easier to see surrounding objects, marine life, and potential hazards. Additionally, maintaining a careful swimming technique that minimizes sediment disturbance is crucial. Stirring up the bottom can lead to a cloud of silt that significantly hampers visibility, making it difficult for divers to see even short distances. By combining the use of artificial light and a mindfully cautious approach to movement, divers can significantly enhance their ability to see clearly underwater, leading to a safer and more enjoyable dive experience.

The other options may not effectively contribute to improving visibility: swimming faster could actually create more turbulence, stirring up sediment; polarized goggles are useful for surface glare but may not significantly enhance visibility underwater; and ascending to shallower depths might not guarantee better visibility if the water conditions remain the same.