On Wednesday, September 25, 2013 2:42:08 PM UTC-4, Tom wrote:

Figure 2-9 indicates dive brakes extend top and bottom of wing, while spoilers are top only.

snip

Um, that's correct. The distinction has been common knowledge for over a half-century, but lots of smart people (including some who write POHs!) still misunderstand the distinction. Glad to see a proper definition in what could become a widely used manual.

See also http://en.wikipedia.org/wiki/Dive_brakes