================================================================= Capacities of Tanks ----------------------------+--------+-----+--------------------- | | | Tons Compartments | Frames |Cubic+------+--------+----- | |feet |Diesel| Fresh |Salt | | | oil | water |water ----------------------------+--------+-----+------+--------+----- Double-bottomed tank No 1, | | | | | P[4] | 79-106 |2,798| 66.6 | | Double-bottomed tank No 1, | | | | | S[4] | 79-106 |2,752| 65.6 | | Double-bottomed tank No 2, | | | | | P and S | 57-71 |4,288|102.2 | | Double-bottomed tank No 3, | | | | | P and S | 23-51 |5,760|137.2 | | Deep-wing tank No 4, P and S| 9-23 |5,635|134.2 | | Forepeak tank, single |115-stem|4,500| | 126.4 | Deep tank No 1, P and S |115-115 |5,405| | 150.1 | Deep tank No 2, P and S |107-11 |7,296| | 202.7 | Deep-wing tank No 5, P and S| 2-8 | 900| | 25.0 | Afterpeak tank, single | 2-stem|1,141| | 31.7 | Forepeak tank, single |115-stem|4,550| | |130 Deep-wing tank No 3, P and S| 79-107 |6,276| | |179.4 | | +------+--------+----- Total | | |505.8 |535.9[5]|309.4 ----------------------------+--------+-----+------+--------+----- [4] P stands for port; S, for starboard. [5] 249,500 gallons. =c. Displacement.= (1) The dead-weight scale (fig. 10), shows the ship’s capacity for carrying dead weight, the difference between light and loaded displacement. (2) Figure 10 also shows the ship’s load-line marks[6] and their relation to the decks. These marks establish the safe load line for the ship in different waters, allowing a measure of reserve buoyancy. Load lines are established and assigned by the American Bureau of Shipping. The center of the circle is located exactly amidships on the vessel’s load waterline, and the horizontal line through the circle corresponds to the summer load line. The letters _AB_, used where the horizontal line cuts the circle, indicate the American Bureau of Shipping. The letter _F_ to the left of the vertical line is the fresh-water marking, and _S_ to the right of the vertical line is the salt-water marking. [6] Sometimes called Plimsoll mark; Plimsoll mark indicates maximum allowable draft. =d. Power.= The ship is propelled by a high-power, low-speed Diesel engine. Other engines may be substituted as required.