  We propose to use stopping cosmic-ray muons in the energy calibration of
planned and deployed large underwater detectors. The method is based on the
proportionality between the incident muon energy and the length of the muon
path before it stops. Simultaneous measurements of the muon path and the
amplitude of the signal from the photomultiplier tubes allow a relation between
the energy deposited in the sensitive volume of the detector and the observed
signal to be derived, and also provide a test of detector simulations. We
describe the proposed method and present the results of simulations.
