Page 56 - Ranger Demo

three nights to complete each horizontal angle, but for the Pole Star azimuth at DOS 16 we had to wait ten nights.
All of the new DOS points were built as standard reinforced concrete cylindrical pillars with buried mark, a plinth and two azimuth marks. Copious quantities of cement were required and the Senegalese bricklayer, ‘le maçon’, was very proud of building ‘proper’ pillars instead of the small ‘bornes’ customarily found in Francophone Africa.
Multiple Masters
We had regular meetings with the Senegal- Gambian Secretariat to discuss project progress and would host occasional visits in the field for representatives from each country and DOS Directors. These visits included Cabinet
Figure 7 Building a proper pillar
Figure 8 Denis Rushworth visits with Ngum
Ministers, High Commissioners and Ambassadors! Not to mention Mr Ngum, Head of the Gambian Survey Department and Dennis Rushworth, at that time Assistant Director (Survey) of DOS. Not until recently
have either of us read the detailed report on the
Figure 9 British High Commissioner being shown field work
work in progress produced by John Evans who visited in early October 1976. John was then PSO (UK) and a very experienced DOS surveyor.
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