be wound up on a reel as the ffcv 10 is emptied the beams 32 and 36 can be gradually deflated via bleeder valves to simultaneously provide for ease of winding and flotation of the empty ffcv 10 the gradually deflated beams 32 can also act to keep the ffcv 10 deployed in a straight fashion on the surface of the water during the winding filling and discharging operation the placement or location of the beams 32 on the ffcv 10 is important for stability durability and buoyancy of the ffcv 10 a simple configuration of two beams 32 would place the beams 32 equidistant from each other along the side of the ffcv 10 as shown in fig3 if the cross sectional area of beams 32 is a small fraction of the total cross sectional area of the ffcv 10 then the beams 32 will lie below the surface of the salt water when the ffcv 10 is filled to about 50 of the total capacity as a result the stiffening beams 32 will not be subjected to strong wave action that can occur at the surface of the sea if strong wave action were to act on the beams 32 it is possible that the beams 32 would be damaged damage to the beams 32 would be detrimental to the durability of the ffcv 10 accordingly it is preferable that the beams 32 are located below the salt water surface when the ffcv 10 is filled to the desired carrying capacity these same beams 32 will rise to the surface of.