Topographic survey in Guinea Bissau completed

A team of the Hydrographic Brigade (BH) of the Hydrographic Institute completed fieldwork in Guinea Bissau, in a campaign that took place during October 2017.

These works that fall within the Open Sea Initiative aimed to verify the baptometric evolution of the fund, and also to collect data for cartographic updating of Porto de Bissau, thus contributing significantly to the safety of navigation in that region.

The first part of this work had several tasks:

coordination of 13 points to support nautical cartography;

Assembly of a tidal wave to support the hydrographic survey, and to determine the harmonic constants that will allow more precise tide predictions (for this second function the tidal wave will have to remain in Bissau for more than 6 months);

Assembly of a reference station for sending corrections GNSS for the survey vessel;

Performing a geometric leveling with more than 2500 meters, from the leveling mark placed on the pedestal to Diogo Gomes, passing by the leveling mark where the tidal wave was installed and continuing until the Sé Church of Bissau, where a new leveling mark was placed;

Topographic survey of all port structures in the Port of Bissau, and also of the Fisheries Piers and DICOL that are located in the southwest of Bissau.

After completion of the work on land, we proceeded to survey the Port of Bissau basin, having succeeded in 10 days, with almost 90 hours of navigation, perform a total of 424 spins, and cover an area of about 12 km2.

Near the end of the work, a presentation was made on them at the Portuguese Cultural Center (CCP), located next to the Embassy of Portugal in Bissau, which was attended by representatives of the various local entities who supported this top-hydrographic survey, such as the Guinea-Bissau Port Administration (APGB), the Guinea-Bissau Navy and the Maritime-Port Institute (IMP). This support included the provision of two elements, the Commanders Alberto Type (APGB) and Nando Mboto (Marinha), who followed the field work daily and with great interest.