The use of the texts needs some explanation. Witsen's descriptions have been used entirely as explanation, both with regard to the theoretical part (the formulae) and the part elaborated for this example pinas. To distinguish between the two, the text is divided into two segments that can be clicked with tabs. The 'general' text is displayed by default ('De planks a quarter of the thickness of the stern'), but the user can optionally select the data relating to the XNUMX-foot pinas ('De planks thick XNUMX inches') via the tabs.
Each text fragment is preceded by a citation in brackets: (e.g. 74 I 29), where 74 indicates the page of Witsen's book, I the column (each page in the book is divided into two columns) and 29 the line number. All this for those who want to read the text in its original setting. The book can be viewed online at <a href="https://archive.org/details/gri_33125008247716/page/n291/mode/2up" target="_blank" rel="noopener"> this link</a>.
You have already encountered many of the marine engineering terms used in the section on construction stages, but some of them you will discover here for the first time this link.