Local navigation is used to jump between pages that categorically fall under the same (main) section. The local nav shown in the example above is from the Account section and it is present on all pages under /account.
If there are secondary pages in a section, then links to those pages are shown inside hover-list menus. A blue-colored link indicates the page/sub-section currently in view.
The local nav spans the full width of the page up to 640px, at which point it collapses into a stacked menu.