How To Use This Website

For those that want an introduction to the full range of the website, we recommend that you start at the home page.
This will provide links to three keynote pages.
From each of these you can navigate yourself to other parts of the web site.

This is a very comprehensive website.
In these days of web searches you may find yourself arriving on any one of about 400 pages and have little idea of the riches upon which you have stumbled.
To give them a better perspective, readers are directed to this page which suggests two easy ways of getting the best use out of what is on offer.
Whether starting at the home page, navigate – site map page or from the contents list below readers can move easily from a few simple bullet points, via simple explanations, to various levels of in-depth information.


Particularly note, the navigate – site map page is the best gateway to the deeper levels of this rather special site.
Alternatively if you are in a hurry you can use the drop down menus above.


Those that have a good idea what they are looking for, can make use of the contents list below:

For other introductory material please consult:

two approaches

marine knowledge

special colour vision

navigate – site map