Barer A S, Sokolova T A, Tardov V M, Iashin Iu P
Kosm Biol Aviakosm Med. 1980 May-Jun;14(3):37-40.
With an increase in acceleration value the accuracy of human performance decreases. This becomes very noticeable at +Gz greater than 5 g. In this situation work capacity can be raised by increasing an angle between the Gz vector and the long axis of the human body. Pilots need to be tested for acceleration tolerance before they are allowed to fly at +Gz greater than or equal to 8 g.
