Peak demand can vary greatly based on the number of simultaneous water uses, the flow rates of individual water fixtures, and the length of time fixtures operate. 5 gpm (two fixtures running simultaneously at 2.5 gpm) is a good estimate of peak demand, for the typical household. Water wells that reliably yield 5 gpm should be able to meet peak and daily needs for most residences. Wells yielding less than 5 gpm, however, are sometimes the only water source available.
Lifeboat may refer to: Lifeboat (shipboard), a small craft aboard a ship to allow for emergency escape. Lifeboat (rescue), a boat designed for sea rescues. Airborne lifeboat, an air-dropped boat used to save downed airmen.
Notoriously, RMS Titanic carried only 20 lifeboats for over 2,000 crew and passengers. This was because the ship was considered (by design) to be the ultimate lifeboat. Featuring multiple watertight compartments to prevent the spread of flooding, the ship was designed to remain afloat even if several compartments were breached.