cable 44 once the boom sections are filled a pair of flexible draft members 64 and 64 39 are deployed about the area to be confined by the boom and a first pair 22a and 22b of the boom sections are placed in the water between the pair of cables or the like 64 and 64 39 the pair of boom sections are brought together and where skirts and webs 26 and 28 are employed the skirts are suitably connected as is the ballast chain 40 by a through bolt then the draw tight cap 50 is placed over each end of the pair of boom sections which have been brought together a connector 58 with the internally threaded end 66 separated from the externally threaded end 68 is passed through the grommets 58 through each of the eyes 46 at the ends of cables 44 then the separated elements are reunited as shown in fig2 of the drawing with the connector halves 54 reunited and holding the pair of boom sections together the bolts 62 are removed from the clevis ends 60 and 60 39 and the respective cables 64 and 64 39 are placed between the furcations thereof and the.