We calculated the tide amplitude at the start of the observation period of a group by applying Miguens (2000) correction tables to the high and low tide tables of the Brazilian National Oceanographic Database (BNDO) (Diretoria de Hidrografia e Navegacao, 2014).
Banco Nacional de Dados Oceanograficos (BNDO), [https:// www.marinha.mil.br/dhn/?q=pt-br/node/26].