To optimize no-decompression bottom times, plan repetitive dives so that each successive dive is to a ______ depth.

To optimize no-decompression bottom times, plan repetitive dives so that each successive dive is to a ______ depth.

• A. deeper
• B. the same depth
• C. shallower
• D. vary with conditions

Answer: (C)

When planning repetitive no-decompression dives, you’re managing how nitrogen loads into your body from each dive. Deeper dives add more nitrogen to your tissues, which reduces how long you can stay at depth before you’d need a decompression stop. After a surface interval, some of that nitrogen off‑gasses, but you still have a remaining nitrogen budget to work with on subsequent dives. By arranging dives so that each successive dive is shallower than the previous one, you take advantage of the lower tissue pressures at shallower depths, which increases the available no-decompression bottom time for the next dive. In practice, you start with the deepest planned dive and then move to progressively shallower depths to maximize total bottom time without requiring decompression stops. Going deeper on a follow-up dive would shorten bottom time, staying at the same depth doesn’t optimize the nitrogen budget, and varying with conditions isn’t the fixed approach taught for repetitive no-decompression planning.

When planning repetitive no-decompression dives, you’re managing how nitrogen loads into your body from each dive. Deeper dives add more nitrogen to your tissues, which reduces how long you can stay at depth before you’d need a decompression stop. After a surface interval, some of that nitrogen off‑gasses, but you still have a remaining nitrogen budget to work with on subsequent dives. By arranging dives so that each successive dive is shallower than the previous one, you take advantage of the lower tissue pressures at shallower depths, which increases the available no-decompression bottom time for the next dive. In practice, you start with the deepest planned dive and then move to progressively shallower depths to maximize total bottom time without requiring decompression stops. Going deeper on a follow-up dive would shorten bottom time, staying at the same depth doesn’t optimize the nitrogen budget, and varying with conditions isn’t the fixed approach taught for repetitive no-decompression planning.