Which statement is false regarding air delivery for various surface supplied diving modes?

The statement indicating that a dedicated high-pressure (HP) compressor is required for both primary and emergency air is false. In various surface-supplied diving modes, the air supply can indeed be supported by a combination of low-pressure (LP) compressors and high-pressure reserves, depending on the specific requirements, planned operations, and safety protocols.

In practice, divers often utilize a combination of LP compressors for continuous supply and high-pressure systems for backup. The LP compressor can generally meet the primary air requirements, while HP reserves serve as an emergency backup, allowing for flexibility and effectiveness in managing air supply.

This understanding is essential in ensuring that divers have a reliable air source, without the necessity of having a dedicated HP compressor for every operation, which could be impractical and unnecessarily restrictive for different diving scenarios. This flexibility in air systems is crucial for efficiently planning and executing diving operations while maintaining safety protocols.