| skos:altLabel | - hydrographic
- hydrographic survey
- Hydrographic Service
- Hydrographic Department of the People's Commissariat for the Navy
- Chief Hydrographic Administration
- Hydrographic Department of the Navy of the USSR
- Hydrographic Office of the Soviet Navy
- Hydrography Service of the Soviet Union Navy
- Imperial Russian Hydrographic Service
- Russian Hydrographic Dept.
- Russian hydrographer
- Soviet Hydrographic Office
- coastal survey ship
- hydrographic and pilot vessels and lightships
- hydrographic vessels
- research and hydrographic
- Russian Hydrographic Service#The Soviet period (1917-1992)
- Defense Ministry Main Directorate of Navigation and Oceanography
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