CHAPTER 7 — Scuba Air Diving Operations 7-15 Figure 7-6.  Oxygen Consumption and RMV at Different Work Rates.   Rest Oxygen Consumption Rate (lpm) 0 0 1 28 2 56 3 85 1 2 3 Sitting, standing quietly Walking in tank, minimum rate Light activity in chamber Walking, muddy bottom, minimum rate Walking in tank, maximum rate Walking, muddy bottom, maximum rate Swim, 0.8 knot (average speed) Swim,1 knot Swim,1.2 knots Work VO₂ (lpm) RMV (acfm) RMV (lpm) Work Level Rest 0.24 0.35 10 — Sitting, standing quietly 0.40 0.42 12 Light Walking in tank, minimum rate 0.58 0.53 15 Light Light activity in chamber 0.70 0.64 18 Light Walking, muddy bottom, minimum rate 0.80 0.71 20 Moderate Walking in tank, maximum rate 1.10 0.99 28 Moderate Walking, muddy bottom, maximum rate 1.20 1.14 32 Moderate Swim, 0.8 knot (average speed) (use for planning purposes, round up to 1.4) 1.40 1.34 38 Moderate Swim, 1 knot 1.70 1.59 45 Heavy Swim, 1.2 knot 2.50 2.12 60 Severe