Boiling can be seen without the help of a thermometer, and by this time, the water is disinfected. Though the boiling point decreases with increasing altitude, it is not enough to affect the disinfecting process. "Boiling" is the method of cooking food in boiling water or other water-based liquids such as stock or milk. Simmering is gentle boiling, while in poaching the cooking liquid moves but scarcely bubbles. The boiling point of water is typically considered to be 100 °C or 212 °F. Pressure and a change in the composition of the liquid may alter the boiling point of the liquid.
Boiling vessel Boiling vessel A boiling vessel is a water heating system fitted to British armoured fighting vehicles that permits the crew to heat water and cook food by drawing power from the vehicle electrical supply. It is often referred to by crewmembers (not entirely in jest) as the most important piece of equipment in a British armoured vehicle. The "Vessel Boiling Electric" or "BV" was an innovation at the very end of World War II, when the Centurion tank was introduced with the device fitted inside the turret. Previously, British tank crews had disembarked when they wanted to "brew-up" (make tea),