Specifications

MIL-STD-1472E
5.2.4.4 Faint signals. When [he detection of faint signals is requiti and when theambient
illuminance may be above 2,7 lux (0.25 ft-c), scopes shall be hooded, shielded, or recessed. (A
suitable faltersystem may be employed, subject to approval by the procuring activity.)
5.2.4.5 Luminance rame of adjacent surfaces. The luminance range of surfaces immediately
adjacent to scopes shall be between 10% and 100% of semen baekgmund luminance. With the
exeeption of emergency indicators, no light source in the immediate sumounding area shall be of a
greater iuminance than the CRT signal.
5.2.4.6 Ambient illuminanee. The ambient ilh.tminancein the CRT area shall be appropriate for
other visual functions (e.g., setting controls, reading instruments) but shall not degrade the visibility of
signals on the CRT display.
When a CRT display is used in variable ambient illuminance, controls
shall be provided to dim all light sources, including illuminated panels, indicators and switches in the
immediate surround. Automatic adjustment of CRT brightness may be used if the CRT brightness is
automatically adjusted as a function of ambient illurninance and the range of automatic adjustment is
adequate for the full range of ambient illuminance.
5.2.4.7 Reflected dare. Reflected glare shall be minimkd
by proper placement of the scope
relative to the light source or by use of a hood or shield, optical coatings on the CRT, or filter control
over the light source.
5.2.4.8 Adiacent surfaces. Surfaces adjacent to the scope shall have a matte finish.
5.2.4.9 Pictoriai/EraPhic situation formats. Pictorial or situation data such as plan position
indicator &@ shall be presented as luminous symbols on a dark background.
5.2.4.10 Font legibility.
Where alphanumeric characters appear on CRT-like displays, the font
style shall allow dkMmhrm
“onof similar characters, e.g., kmer lhumber 1,letter
Zhrnber 2.
5.2.5
Lanze-scxeendisplays.
5.2.5.1 ~. Large-screen displays maybe used under the following conditions:
a. A group of operators frequently refers to the same information and is required to interact as a
team, based on the same information.
b. One or more members of a team of operators must move about, yet must frequently refer to
information required to make decisions
—information they cannot crmy with them or do not have
displayed at their assigned position(s).
c.
Spacecxotberumlrads
preclude the use of individual displays for each team member to call
up commonly-used information.
d. h may be desirable to have general information available to persons who shou!d not interrupt
on-going group operations by looking over the shoulder(s) of individual operator(s) to see their
individual displays.
5.2.5,2 Avoidance. Large-screen displays shall be used only when the spatial and
tx~vi~tmllwl)ul LLMJ&&.ML ~OW sa~sfacto~ observational geometry to ens~lmthat all critical operators
have visual access in terms of viewing distance, angle rindlack of interference from intervening
objects, personnel or ambient hghtmg. It the dqhy is vptkxdy pqieuwd, w 5,2.L.6,