Abstract: Apparatuses and processes for detecting misalignments between various portions of a deformable body, such as an aircraft, are disclosed. Orientation detection devices, such as potentiometric vertical indicators and gyros, are provided at a master module disposed at a predetermined location on the structure and in a remote module located at a predetermined portion of the structure remote from the reference location. The orientation of the remote portion of the structure, as determined from the remote module is compared to the orientation of the master module to thereby determine the orientation of the remote portion of the structure relative to a fixed reference. The orientation detection devices are secured to the various locations through the use of a standardized track and base assembly, whereby virtually all components of the master and remote modules are interchangeable. The remote module may be disposed on a trammel point assembly wherein the orientation of a predetermined surface may be determined.