What precaution should be taken to avoid losing personal items in water?

Using a waterproof barrel or dry bag is the most effective precaution to avoid losing personal items in water. These types of containers are specifically designed to keep belongings dry and safe from water damage. They are typically sealed tightly and provide a secure way to store items while participating in water activities or in environments where there is a risk of items falling into water.

In contrast, keeping items on your lap, holding them tightly, or storing them under your seat may not offer the same level of security. These methods can still lead to loss if the items are accidentally dropped, knocked over, or if water splashes onto them. A waterproof barrel or dry bag, however, mitigates these risks efficiently, ensuring protection from both water exposure and the likelihood of losing items during activities on or near water.