Purpose of chapter: to help you finding around in the manual.
To the left you see a grey vertical panel containing a navigation bar with a Global TOC: Table Of Contents. Uppermost in the Global TOC is a link to return to the Sailor Logbook Homepage, followed by a link to a Search function.
Hereafter the Global TOC has a list of links to various help pages (chapters). A help page is opened by clicking / tapping:
When a help page is opened, its entry in the Global TOC is highligthed. Scroll the Global TOC if it's longer than your screen height.
The help pages are shown in one and same browser window (this), i.e. clicking / tapping links usually opens pages in the same window.
In contrast to this, clicking / tapping an external link - which has this color - opens a new window or tab.
The manual has many cross references - embedded links forth and back. So - to browse the history - be prepared to use the browser commands Back (PC/Mac: Alt+left arrow) and Forward (PC/Mac: Alt+right arrow) very often.
To help navigate and overview individual chapters, many have a local TOC at top.
Sailor Logbook S App manual - © Copyright 2018 CoaSoft ApS Denmark