Seamanship Navigation 6 Boats and boating 5 Safety measures 3 Handbooks, manuals, etc 2 Sailing 2 Study and teaching 2 Armed Forces 1 Boatbuilding 1 Defence: Navy 1 Environmental aspects 1 Examinations, questions, etc 1 Fishing boats 1 Fishing ports 1 Jurisdiction over ships at sea 1 Maintenance and repair 1 Marine engineering 1 Maritime law 1 Merchant marine 1 Naval art and science 1 Naval strategy 1 Pilots and pilotage 1 Rule of the road at sea 1 Safety regulations 1 Sea-power 1 Shipping 1 Ships 1 Ships, Iron and steel 1 Standards 1 Study and teaching (Higher) 1