Cat. OG7 (CLASS II): Maritime operations and dredging works
OS 25 (Classifica IV): Archaeological Excavations
OS 20-A (Classifica I): Topographic surveys
OS 20-B (Classifica III-BIS): Geognostic surveys
This concerns implementation of geognostic surveys and subsoil exploration with special apparatus, also for environmental purposes, including soil and rock sampling and implementation of tests in situ.