referring now to the drawing , wherein like reference characters designate like or corresponding parts throughout the several views , fig1 shows a helicopter 10 utilizing the present invention to pick up an object 11 floating at sea 13 . a line 14 , of buoyant material such as polypropline , is attached to cargo object 11 and is preferably tied in knots 16 at 5 foot intervals along its length ( approximately 50 feet ). line 14 floats on the surface 17 of the water alongside and outward from the cargo 11 . a metal hook 18 having a slot 19 slightly wider than the width of the line 14 at its closed end is rigidly secured to the bottom of styrofoam float 21 . float 21 , in turn , is attached by ring 22 to hoist line 23 suspended from helicopter 10 . in operation , the hook 18 and float 21 secured thereto are towed by helicopter 10 by means of the hoist line 23 along the surface 17 of the water and over line 14 . thereupon , the hook 18 contacts the line 14 and directs it to slide into the slot 19 where one of the knots 16 in the line 14 may become engaged by the sides of the slot 19 . knots 16 being too large to slip through the slot 19 form a secure point of connection between line 14 and the slot . object 11 may be retrieved from the water by the helicopter 10 ( fig2 ) after the hook 18 has engaged the line 14 . helicopter 10 may lift the object 11 out of the water by winching in hoist line 23 . fig3 shows a detailed side view of the float 21 , hook 18 , and slot 19 , and ring 22 described hereinabove . a steel rod 24 is bent to form ring 22 approximately 2 inches in diameter at one end , and slot 19 , approximately 4 inches long and slightly more than 3 / 4 of an inch wide , at the opposite end extending down at approximately a thirty degree angle from the central part of the rod 24 . the rod is further bent to form hook 18 immediately in front of slot 19 approximately 8 inches long , opening up to a width of approximately 6 inches relative to the central part of the rod 24 . a rectangular plate structure 26 is welded around slot 19 and part of hook 18 to reinforce those structures and additionally to act as a guide vane and as ballast for float 21 when it is towed along the surface of the water . float 21 may be comprised of a rectangular styrofoam block 14 inches long , 12 inches wide , and 4 inches deep with its edges beveled at its front and rear ends . float 21 is secured to rod 24 immediately behind ring 22 in any conventional manner . one such way is to employ bolts 27 which extend through float 21 between top plate 28 and bottom plate 29 which is welded to the rod 24 . the rod 24 is 3 feet long so that slot 19 and plate 26 may extend beyond the rear of float 21 thereby providing greater stability as the float 21 , slot 19 , and hook 18 are towed through the water . therefore , it is apparent that the disclosed system for recovering objects floating at sea is a simple , rapid , and efficient technique employing equipment economic to manufacture , durable in use , and yet effective in operation . further , the present invention allows helicopters and ships to recover objects floating at sea without manual intervention and , therefore , without hazard to personnel even in high sea states . obviously , other embodiments and modifications of the present invention will readily come to those of ordinary skill in the art having the benefit of the teachings presented in the foregoing description and drawings . for example , the float may be provided with a hydrodynamic shape , or the knots 16 on line 14 may be replaced by wooden or metal stops which , when secured along the line , may also provide additional buoyancy for it . it is therefore , to be understood that this invention is not to be limited to the embodiments and modifications described , and said other embodiments and modifications are intended to be included within the scope of the appended claims .