11.2.1.1-5 Location of Displays

All displays, including alarm indicators, should be within the upper limit of the visual field (75 degrees above the horizontal line of sight (LOS)) of the 5th percentile female and the lower limit of the visual field of the 95th percentile male (see Table 11.4), and should be mounted so that the interior angle between the LOS and the display face is 45 degrees or greater (see Figure 11.2).

Additional Information: The principal factors affecting the readability of displays, including annunciator tiles, are: (1) display height and orientation relative to the user’s LOS when positioned directly in front of the display, (2) display distance and orientation relative to the user’s straight-ahead LOS when the user must read the display from an off-side position, and (3) the size of display markings relative to the distance at which the display must be read. Section 1.3.1, “Alphanumeric Characters,” addresses character size, which is not considered here. Except as specifically noted, measurements of angles should be made with the eye point in line with the leading edge of the benchboard.0700

 

Table 11.4 Anthropometric Data Used To Set Limits For Equipment Dimensions1

 

 

Position

Bounding Measurements in inches (cm)

5th Percentile Female

95th Percentile Male

Standing (without shoes)

Stature (Height)

63.5 (161.2)

73.9 (187.8)

Eye height from floor

59.1 (150.1)

69.1 (175.6)

Shoulder height

48.4 (123.0)

61.2 (155.3)

Elbow height

38.4 (97.5)

45.7 (116.0)

Fingertip height

21.7 (55.1)

28.5 (72.4)

Functional reach23

26.7 (67.7)

34.9 (88.6)

Extended functional reach3

28.9 (73.5)

37.1 (94.2)

Seated

Popliteal height (bend at back of knee)

14.8 (37.6)

18.6 (47.3)

Sitting height above seat surface (erect)

32.9 (83.6)

38.3 (97.2)

Eye height above seat, sitting erect

28.5 (72.4)

34.0 (86.2)

Shoulder height above seat surface

20.0 (50.9)

25.4 (64.6)

Elbow height above seat surface

7.7 (19.5)

7.9 (20.1)

Functional reach2

26.7 (67.7)

34.9 (88.6)

Extended functional reach3

28.9 (73.5)

37.1 (94.2)

Thigh clearance height

5.5 (14.1)

7.3 (18.6)

Buttock-popliteal length

18.2 (46.3)

21.5 (54.7)

Knee height

19.8 (50.3)

23.8 (60.4)

1   The data in this table are from MIL-STD-1472G, Appendix B (DoD, 2012). MIL-STD-1472G gives separate values for general forces, Army aircrews, and Air Force pilots. This table contains the values for general forces. The MIL-STD contains additional anthropometric data not represented in this table. Applicants may use alternative values if a design is intended for a population for which these data are not representative or if updated data are available.

2   Measured from wall to tip of right index finger, with arm extended horizontal to floor, both shoulders against wall.

3   Measured as stated above, except right shoulder extended as far as possible with left shoulder against wall.

 

 

0o

Figure 11.2 Line Of Sight

(Source is Figure 2 in MIL-STD-1472G, 2012)