🔍 Key Concepts

• Ullage as used in cargo and tankage measurements • Relationship between ullage, soundings, and tank geometry • Where measurements are typically taken from in tank gauging (top vs. bottom)

💭 Think About

• Think about whether ullage describes how full or how empty a tank is. • Ask yourself: is ullage usually measured from the top of the tank or from the bottom of the tank? • Consider how a tankerman or engineer would practically measure ullage on board — what reference point would be easiest and most standard?

✅ Before You Answer

• Verify whether ullage refers to the liquid/solid height or the empty space in a tank. • Check if the definition involves a distance from the tank cover or from the tank bottom. • Confirm that ullage is expressed as a linear measurement (distance) rather than a percentage or weight.