(form "00260" (size 43  6)
  (help "00260_TIP_0")
  (heading "REFERENCE ANGLE TO BACKSIGHT")
  (label (position  2  3) (text "Backsight"))
  (label (position  2  4) (text "Angle"))
  (field "bsite" (position 12  3) (display_length 16)
    (background) (input disallowed))
  (field "bsang" (position 12  4) (display_length 12) (input allowed)
    (translate upper) (format dms_angle) (null disallowed) (max_length 12)
    (low_bound 0) (high_bound 6.283185307))
  (default_buttons)
)