Specifications

MIIXTD-1472E
imposing personnel safety hazards.
5.2.2.1.17 Indicator covers. If the design of legend screen or indicator covers does not prevent
inadvertent interchange, a means shall be provided for checking the covers after installation to ensure
they are properly installed.
5,2.2,1.18 Color coding.
With the exception of aircrew station and training equipment
applications, transilluminated displays shall conform to the following color coding scheme, in
accordance with Type I - Aviation colors of MIL-C-25050. Light transmitted by the color filters
should be visible through laser protective (or other) eyewear required to be worn by the user.
a. FLASHING RED shali be used ordy to denote emergency conditions which require operator
action to be taken without delay, or to avert impending personnel injury, equipment damage, or both.
b. RED shall be used to alert an operator that the system or any portion of the system is
inoperative, or that a successful mission is not possible until appropriate connectiveor override action is
taken, e.g., “no-go,” “error,” “fadure,” “malfunction.”
c. YELLOW shaIl be used to advise an operator that a condition exists which is marginal.
YELLOW shall also be used to alert the operator to situations where caution, recheck, or unexpected
delay is necessary.
d. GREEN shall be used to indicate that the monitored equipment is in tolerance or a condition is
satisfactory and that it is all right to proceed (e.g., “in-tolerance”, “ready”, “function activated”).
e. WHITE shall be used to indicate system renditions that do not have “right” or “wrong”
implications, such as alternative functions (e.g., Missile No, 1 selected for launch) or transitory
conditions (e.g., action or test in progress, function available), provided such indication does not
imp]y success or failure of operations.
f. BLUE maybe used for an advisory light, but preferential use of BLUE should be avoided.
5.2.2.1.19 Fiaahim lids. The use of flashing lights shall be mhimizd
. Flashing fights
should be ustxl only when it is n~ to call the operator’s attention to some condition requiring
immediate action. The flash rate shall be within 3 to 5 flashes per second with approximately qual
amounts of ON and OFF time. Flashing lights which could be sirnuhaneously active should have
synchronized flashes. If the display is energized and the flasher device fails, the light shall illuminate
and bum steadily (see 5.3.2.4).
5.2.2.2 Legend lights.
5.2.2.2.1 ~. Legend lights shall be used in preference to simple nxhcator hghts except where
design mnsiderations demand that simple indicators be used.
5.2.2.2.2 Color coding. Legend lights shaJl be color coded in conformance with 5.2.2.1.18.
Legend lights required m denote pexsonnel or equipment disaster (FLASEUNGRED), caution or
impending danger (YELLOW), or master summation no-go (RED) or go (GREENI shall he
d)scrlm]nab]y larger, and preferably brighter, than all other legend lights.