Automatic prevention of label overlap
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1976-03-01
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NTL Classification:NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;NTL-SAFETY AND SECURITY-Human Factors;
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Abstract:The project comprised a number of simulation exercises
designed to evaluate methods of either preventing or
resolving the problems likely to be caused by label overlap on
Labelled Plan Displays (LPD). The automatic prevention of
label overlap was investigated in ATCEU Project EU 146, (ATCEU
Report No 35l). These earlier trials determined that one of the
methods used, automatically alternating overlapping labels, was
not suitable. The report concluded that the other methods used,
machine re-positioning and reversion to a tabular display, were
effective whether used separately or together, but that they should
be brought into operation manually and not automatically. The
exercises in EU 146 compared the amount of data v/hich controllers
could extract from the LPD when the different methods of preventing
overlap were used. The controllers were not exercising any control
function, nor was there any other source of flight data such as
a flight progress board. The project which is the subject of this
report was a follow-up of the earlier trial, using manually
controlled methods as had been recommended, and conducted in an
active control environment. The simulation also presented an
opportunity to demonstrate a new input device, the Touch Sensitive
Digitiser (TSD)• This was in no way an evaluation of the device,
but some observations on its use in the ATC role are included
after the discussion section. The project was sponsored by the
Director of Control (Plans) NATS, and carried out at the ATCEU
Bournemouth (Hurn) Airport in two stages, a pilot study between
11 and 29 June and the main simulation between 13 August and 14
September 1973.
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