Ullage

The dry ullage will be obtained in the same manner, the dry inches being used instead of the wet.

Upon completion of loading, all cargo tanks shall again be inspected and ullages carefully measured and recorded, with temperatures, in the Cargo Record Book, Port Log and Supplementary Loading and Discharging Report.

According to the Colombian Government's report regarding this accident, the bomb explosion itself did not compromise the structural integrity of the airplane; however, the explosion punctured the CWT and ignited the Jet A fuel/air vapor in the ullage, resulting in the destruction of the airplane.

[…]5 hhds. rum/ 5 bbls. flour/ 1 bbl. sugar/ 9 do. pork/ 1 do. suett/ 3 do. cocoa/ 6 do. peas/ 2 ullage bbls. vinegar[…]

Mopps […] was draining his vast array of wine-glasses, lest the waiters carrying them off should find any "ullages" in them for surreptitious tippling on stair-cases.

The Duties on Spirits in England are charged on the number of proof gallons they contain, which is ascertained by first “gauging” or “ullaging” the liquor, and then “trying its strength” by Sike's hydrometer, in the way already described […]