PS-REP-167 · r1
REPRESENTATION
OBSERVED
ENGAGED · ONGOING
MOTION HELD OUT OF VIEW
The view is steady because something is working hard to keep it so, and that work is the part not shown.
01 DEFINITION
Condition in which a view is held steady against the movement of the platform carrying it, so the operator reads a scene that no longer carries evidence of how much that platform is moving, while judgements made from it depend on exactly that.
02 CONDITIONS
UNCERTAINTY
UNRECORDED
How much correction is being applied is not captured anywhere the reader can see.
TIME PRESSURE
SUSTAINED
The view stays corrected for as long as it is useful, which is most of the time.
ERROR ASYMMETRY
DEFERRED
Reading a corrected view as an uncorrected one costs nothing until the correction runs out.
OPERATOR STATE
CONCURRENT
The operator is carried by the platform and reading its output at the same time.
03 WHERE IT APPEARS
MARITIMEStabilised presentation removes the roll from the picture and with it the reader's sense of how much roll there is.
AVIATIONA corrected view stays level while the platform does not, and the correction is not itself part of what is read.
MOBILITYCompensated displays stay legible over rough ground, which is also where the roughness stops being felt as information.
MEDICALMotion compensation makes a moving structure readable and removes the movement that was part of the finding.
INDUSTRIALDamped instrumentation smooths what it reports, so a steady reading and a heavily corrected one look the same.
DEFENSEThe presentation is held on the scene while the platform moves under it, and the platform's movement leaves the picture.
04 WHAT AEON WORKED THROUGH HERE
Holding the view steady was the requirement and it worked. What went out with the shake was the operator's only unprompted sense of what the platform was doing. The work went into what a corrected view has to say about the correction, rather than into how much of it to apply.
The question it keeps returning to is how a steady view admits what it is compensating for — restoring the movement undoes the reason for removing it, and leaving it out means the reader cannot tell a calm situation from a corrected one.