Navigation of this website is based on a model used by many commercial sites and is very easy, once you get the hang of it. If you have any better suggestions then I would love to hear them - the email address is at the bottom of every page.
Down the left side of each page you will find hyperlinks to other pages. Pages in the current section are displayed as white text on a navy background. Pages in other sections are displayed as navy text on a light blue background. Just left-click on the page you want to view and it will be displayed.
The line above the page title of each page shows you where you are within the website.
The only time that the text on this line contains no hyperlinks is when you are viewing the Home page.
At all other times clicking on the word "Home" will take you back to the Home page.
Depending where you are on the site, other words may also be hyperlinked. These will take you to either the start page of the current section (when the rightmost word is hyperlinked) or to a section above.
There is, of course, no reason why you should not use the "Back" button on your browser to go to previous pages.