A diver weighing 90 kg/200 lb. buys a new shell-style dry suit with heavy-weight, cold water underwear and wants to calculate how much weight he needs to begin his buoyancy check at the beginning of a dive. Because the diver is a bit overweight for his height, he uses the maximum amount of weight recommended for his suit and underwear as listed on PADI’s Basic Weighting Guidelines chart. The boat uses steel cylinders, and manages to find one that is empty to conduct his buoyancy check. Using the Basic Weighting Guidelines, the described diver should begin with 16 kg/34 lb. (kg/lb.) prior to a buoyancy check in salt water. In fresh water the diver should would begin with 12.8 kg/27 lb. (kg/lb.) prior to a buoyancy check.