A decision was taken quickly to construct the tide predicting machine according to Ferrel's specification but it required a high quality machinist to undertake the work and it was eighteen months later before such a person could be found.
Ang desisyon ay kinuha sa mabilis na bumuo ng kati predicting makina ayon sa Ferrel's detalye ngunit ito na kinakailangan ng isang mataas na kalidad ng mekaniko na magsagawa ng mga trabaho at ito ay labing-walo buwan mamaya bago tulad ng isang tao ay maaaring matagpuan.