FIG. 6 is a schematic illustration of a distance measuring system for use in a position locating system in a self- contained breathing apparatus according to one embodiment of the present invention.

FIG. 7 is representation of measurement data that may be 65

operated on by the measurement system according to one embodiment of the present invention.

FIG. 8 is a representation of the quantities to be measured according to one embodiment of the prevent  invention.

FIG. 9 is a representation of the quantities to be measured according to one embodiment of the prevent  invention.

FIG. 10 representation of the quantities to be measured according to one embodiment of the prevent  invention.

FIG. 11 representation of the quantities to be measured according to one embodiment of the prevent  invention.

FIG. 12 representation of the quantities to be measured according to one embodiment of the prevent  invention.

FIG. 13 representation of the quantities to be measured according to one embodiment of the prevent  invention.

FIG. 14 is a representation of a room to be measured according to one embodiment of the present  invention.

FIG. 15 is a representation of the resulting measurement data collected in measuring a room according to one embodiment of the present invention.

FIG. 16 is a representation of a partial map created from measurement data collected from a measurement system according to one embodiment of the present  invention.

FIG. 17 is a representation of a partial map created from measurement data collected from a measurement system according to one embodiment of the present  invention.

FIG. 18 is a representation of the resulting measurement data collected in measuring a room according to one embodiment of the present invention.

FIG. 19 is a representation of the resulting measurement data collected in measuring a room according to one embodiment of the present invention.

FIG. 20 is a representation of the resulting measurement data collected in measuring a room according to one embodiment of the present invention.

FIG. 21 is a representation of a partial map created from measurement data collected from a measurement system according to one embodiment of the present  invention.

FIG. 22 is a representation of a partial map created from measurement data collected from a measurement system according to one embodiment of the present  invention.

FIG. 23 is a representation of a partial map created from measurement data collected from a measurement system according to one embodiment of the present  invention.

FIG. 24 is a representation of a partial map created from measurement data collected from a measurement system according to one embodiment of the present  invention.

FIG. 25 is a representation of a measurement grid accord- ing to one embodiment of the present invention.

FIG. 26 is a representation of a measurement grid accord- ing to one embodiment of the present invention.

FIG. 27 is a representation of a measurement grid accord- ing to one embodiment of the present invention.

FIG. 28 is a representation of a measurement system according to one embodiment of the present  invention.

FIG. 29 is a representation of a measurement grid accord- ing to one embodiment of the present invention.

FIG. 30 is a representation of a measurement grid accord- ing to one embodiment of the present invention.

FIG. 31 is an electronic signal processing system accord- ing to one embodiment of the present invention.

FIG. 32 is a flow diagram for operating a signal process- ing system according to one embodiment of the present invention.

FIG. 33 is a representation of the sensor display of a mask for an SCBA according to one embodiment of the present invention.