Subject
- Harbours6
- Marine navigation4
- Maritime transport4
- Communication3
- Maritime equipment3
- American War of Independence (1775-1783)2
- Diplomacy2
- Peace treaties2
- River navigation2
- Canal navigation and inland waterways legislation1
- First World War (1914-1918)1
- Frontiers1
- International relations1
- Maps1
- Mesopotamian Campaign (1914-1918)1
- Navigational aids1
- Oilfields1
- Railways1
- Second World War (1939-1945)1
- Shipping1