3-12 Change A U.S. Navy Diving Manual—Volume 1 Figure 3-6.   Oxygen Consumption and RMV at Different Work Rates. Rest O xygen  C onsum ption  R ate  (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) 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