A source of salvation in a crisis.
A particular crease in the palm.
A line from the diver to a tender at the surface control point.
A line to which a drowning or falling victim may cling.
A means or route for transporting indispensable supplies.
System or structure of vital importance to a community.
On the deck of a boat, a line to which one can attach oneself to stay aboard on rough seas.
The state of being preserved, how something has survived.
The act of preserving; care to preserve; act of keeping from destruction, decay or any ill.