42 C.F.R. § 84.102 – Man test 6; requirements.

(a) Man test 6 will be conducted with respect to liquefied breathing gas apparatus only.
(b) This test will be conducted to evaluate operation of the apparatus in other than vertical positions.
(c) The wearer will lie face downward for one-fourth the service life of the apparatus with a full charge of liquefied breathing gas, and then a one-quarter full charge of liquefied breathing gas.
(d) The test will be repeated with the wearer lying on each side and on his back.
(e) The oxygen content of the gas supplied to the wearer by the apparatus will be continuously measured.