The BIN module format is more complicated than the RIM format (#5) but allows for non-contiguous program structure and requires less paper tape to store the same program. The BIN format is similar to the structure of an assembly listing in that a channel 7 punch denotes a change of origin and subsequent pairs of columns are interpreted as data in sequential order. Just like the RIM format, channel 8 punches indicate leader or rubout (erased instructions).
jnowaczek
commented
2 years ago 
The BIN module format is more complicated than the RIM format (#5) but allows for non-contiguous program structure and requires less paper tape to store the same program. The BIN format is similar to the structure of an assembly listing in that a channel 7 punch denotes a change of origin and subsequent pairs of columns are interpreted as data in sequential order. Just like the RIM format, channel 8 punches indicate leader or rubout (erased instructions).
See pages Intro-13 through Intro-14: http://bitsavers.trailing-edge.com/pdf/dec/pdp8/software/DEC-08-NGCC-D_PaperTapeSW.pdf