How many cruise liners are there?

When operating a boat near other boats or when entering a congested area why should you watch your wake California? How much is the fare from manila to bohol? How does a diesel submarine recharge its batteries? Will jet boat motors get damaged in freezing weather? How were the government lifeboat laws at fault for the titanic sinking? Where place to use mandatory sign? What are details of construction joint in raft foundation 1.2 mt deep? In which country are Royal Caribbean Cruises based? What color is the triangular shaped daymark by shore? Why does your 1977 Suzuki spirit 25hp outboard motor idle fine and revs fine and you can put it in gear and troll but when you try to go fast the motor dogs and stalls any ideas? When does a dingy become a yacht? What is a buoy with white ansd a blue band? Where can one find information about only cruises? What is the year of model number yam4x40049? What pulley systems are used on a sailboat? What is the weight of a 1967 Gibson 32 ft houseboat? You see a white marker with an orange crossed diamond and black lettering what does this marker tell you? What is the proper points gap on a 1970 9.8 Mercury? Where could one find luxury sailboats for sale online? Why are submarines built of hard thick sheet of metal?