In 2013, experts of Fertoing continued working to ensure safe navigation in the approaches and seaports of Sakhalin Island – Moskalvo, Nevelsk, Nabil, Kaigan, Shakhtersk, Kholmsk, Korsakov, Uglegorsk, Boshnyakovo.

Despite their remoteness from main supply bases, poor transport access and harsh weather conditions all work was performed on time and at a high level.

The work scope included: establishment of horizontal and vertical datum, bottom survey, geodetic corrections of shoreline contours and hydraulic structures. The data was submitted to the Central mapping agency №280 (Pacific branch) for technical expertises, the results of which were highly appreciated for their quality and accepted for mapping and navigation.