Normal and maximum working limits for SCUBA are:

• A. 130fsw (Normal) and 190fsw (Max)
• B. 60fsw (Normal) and 100fsw (Max)
• C. 190fsw (Normal) and 250fsw (Max)
• D. 100fsw (Normal) and 150fsw (Max)

Answer: (A)

Normal working limits are the depth range at which dives can be planned and conducted using standard gas and procedures without needing advanced gas mixes or complex decompression planning. In this context, the commonly used pair is 130 feet of seawater as the normal limit and 190 feet as the maximum limit. This pairing reflects standard training tables for open‑circuit SCUBA in many EOD diving programs, where operations up to 130 fsw are considered routine, and beyond that up to 190 fsw requires more careful planning and awareness of decompression considerations.

Other depth pairs don’t align with this typical NWL/MWL framework: they’re either too shallow for the standard open‑circuit approach, or they imply deeper operations that would require specialized gas mixtures and more extensive decompression planning.