108 NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE The freeboard of boats of this type depends on their length, and in fresh water shall not be less than the following amounts:— Length of the boat in feet. Minimum freeboard in inches. 26 8 28 9 30 10 Type B.—Pontoon life-boats having a well deck and collapsible bulwarks. All the conditions laid down for boats of Class 1, C, shall be applied to boats of this type, which differ from those of Class 1, C, only in regard to the bulwarks. Type G.—Pontoon life-boats having a flush deck and collapsible bulwarks. The minimum freeboard of boats of this type is independent of their length, and depends only on their depth. The freeboard in fresh water shall not be less than the following amounts:— Depth of the boat in inches. Minimum freeboard in ioches. 12 ' 2| 18 3J 24 , 5£ 30 6\ 20. What type of boats are specified as Class 3? Open boats which have not the buoyancy required for life-boats of Class 1. 21. How many boats are required to be carried by a foreign-going steamer? Such number, and of such aggregate capacity as shall be sufficient to accommodate the total number of persons which is carried, or which the ship is certified to carry, whichever number is the greater. When the number of life-boats is more than 10, one of them shall be fitted with an approved wireless telegraphy installation. When the number of life-boats is more than 13, one shall be a motor boat; and when the number is more than 19, two shall be motor boats. All motor boats shall be fitted with wireless telegraphy and searchlights. / 22. How many sets of davits are required to be carried by a foreign- going passenger steamer or emigrant ship?