| skos:altLabel | - Hydrographic Office
- U.S. Hydrographic Office
- U.S. Navy Hydrographic Office
- US Hydrographic Office
- NAVO
- Naval Hydrographic Office
- Navy Hydrographic Office
- Oceanographic Office
- U.S. Naval Hydrographic Office
- U.S. Naval Oceanographic Office
- U.S. Navy's Hydrographic Office
- US Naval Oceanographic Office
|