A valid data format that Survex doesn't accommodate?

[Andrew Atkinson]

At one of the many Eurospeleo survey meetings, people raised the survey
method of taking 2 sets (not always full) of instruments which generally
were used for forward and back sights. However, not always; they could be
swapped or both read the same way.
We could not think of a way to currently input this, especially while
keeping track of the instruments. Maybe there is a way, but if there is not
what about (I can then open a ticket....)

Guess we need something like

*team Tom compass1
*team Dick Distox2-2
*instrument compass1 "ubss A"
*instrument Distox2-2 "ubss 4" ; try to highlight a potential difficulty

*data normal station newline direction1 tape1 comp1 clino1 newline
direction2 tape2 comp2 clino2
; guess it would be okay to omit various items, say comp one and clino2, to
be perverse!

1
F   2.32   45   3
B   -   225   -2.5
2
F   4.34   56 -4
F    -   57   -3.5
3

Guess this could be done inline, but not nice. The F would indicate
following the from to, a B would indicate the opposite direction.

*data normal from to direction1 tape1 comp1 clino1 direction2 tape2 comp2
clino2
1   2   F   2.32   45   3   B   -   225   -2.5