What does the acronym RNT stand for in diving terminology?

The term RNT stands for "Residual Nitrogen Time," which is a critical concept in diving physiology. It refers to the amount of nitrogen that remains in the body from previous dives after ascending to the surface. This residual nitrogen can impact a diver's safety during subsequent dives, especially if they are planning to dive again within a certain period.

Understanding RNT is essential for managing dive schedules to prevent decompression sickness, also known as "the bends." Divers must take into account their RNT when planning future dives to ensure that they do not exceed safe nitrogen loading limits, which are usually calculated using dive tables or dive computers that consider the nitrogen absorption and elimination rates following past dives. Good diving practices involve monitoring RNT so that divers can maintain safe limits and minimize risk during repeated dive activities.