From Page 10
(2) You're right. A general decline in performance occurs over time, with
the largest decline occurring during the first 30 to 60 minutes on watch.
So far we've covered a number of areas where man's capabilities and
limitations are of concern to HF specialists. Now, before we move on to a
coverage of the material in the second 20 lessons, let's touch on some
important concepts dealing with controls and displays.
In Lesson 9 you learned about a number of different types of visual
displays, both quantitative and qualitative. A good bit of time was spent
discussing an oft-used type of visual display-namely, representational
We mentioned two basic types of representational displays,
inside-out and outside-in. Which of the following statements best matches
the name of the display with an explanation of that type of display?
(1) When the surrounds move but the object remains stationary, you are using
an outside-in display; but when only the object moves, you have an inside-
out display. Turn to Page 77.
(2) When the pictured object moves, but its surroundings are stationary, you
have an outside-in pictorial display; and when the surroundings move, but
the object is stationary, you are using an inside-out display. Turn to Page
(3) When both the object and surrounds move, you have an inside-out display;
and when only the surrounds move, you have an inside-out display. Turn to
(4) When nothing in the display moves, you have an upside-down display; and
when everything moves, the display is called a contact analog. Turn to Page