When bunks displaced hammocks

When did Royal Navy sailors begin receiving bunks instead of hammocks?

Permanent bunks became standard around the County-class generation, but some ships continued using hammocks into the 1980s.

Hammocks persisted aboard some Royal Navy ships into the 1980s, so there was no clean fleetwide changeover date. HMS Belfast illustrates the older arrangement still visible on a preserved cruiser. Bunks became standard from the County-class generation onward. Earlier and transitional classes could retain mixed arrangements, making the change dependent on the individual ship as well as its nominal class era.