NAUI Open Water Scuba Diving Practice Exam Prep & Study Guide

Seawater has an average density that is typically around 1.025 kg per liter. This value accounts for the salinity and temperature of the water, which can affect its density. Seawater is denser than freshwater due to the dissolved salts and other materials, and this higher density means that a liter of seawater weighs more than a liter of pure water, which weighs approximately 1 kg.

Understanding the weight of seawater is essential for divers because it impacts buoyancy, planning for dive weights, and understanding how equipment behaves underwater. Knowing that seawater is around 1.025 kg per liter helps divers make accurate calculations related to their dives.