What is the maximum distance a diver should be from the RDP when using it?

The maximum distance a diver should be from the Recreational Dive Planner (RDP) is critical in ensuring safety during diving activities. The correct answer specifies a maximum distance of 300 meters. This proximity ensures that divers have the necessary access to the RDP for accurate reference to their no-decompression limits and surface intervals during dives.

Being within this distance allows divers to effectively monitor their ascent rates and stay within safe limits, preventing decompression sickness. The RDP provides essential information about safe diving practices, including depth and time limits based on previous dives.

More considerable distances such as 500 meters, 1000 feet, or 1500 feet may hinder a diver's ability to reference the RDP accurately and respond appropriately to changes in their dive profile, which can lead to dangerous situations. Therefore, maintaining a distance of 300 meters from the RDP ensures that divers remain within a safe range to consult this essential tool whenever necessary.