Comments on the combination of respiratory protective devices with PPE against drowning

When it is necessary for a respiratory protective device and PPE against drowning to be worn at the same time and the respiratory protective device does not possess a defined inherent buoyancy, a lifejacket with an inherent buoyancy of at least 275 N must be worn (DGUV Regel 112-201 (to date: BGR 201) governing the use of personal protective equipment against drowning, October 2015, Sections 3.3, 3.5.3 and Annex 1 at www.dguv.de/fb-psa, in German)..