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.
Seaman is a naval rank and is either the lowest or one of the lowest ranks in most navies around the world. In the Commonwealth it is the lowest rank in the navy. The next rank up is able seaman, followed by leading seaman, which is followed by the petty officer ranks. In the United States, it means the lowest three enlisted rates of the U.S. Navy and U.S. Coast Guard, followed by the higher petty officer ranks.