48 water gap 50 inner surface of receptor 52 prefill waterline 54 bumper 56 conical section of buoy 58 latching ring 62 radial opening 64 elongated annular opening 66 axial opening 68 porosity opening 70 buoy to turret seal a detailed description of one or more embodiments of the buoy and receptor as well as methods for its use are presented herein by way of exemplification and not limitation with reference to the drawing figures referring now to fig1 fpso vessel 10 is equipped with moonpool 20 containing turret 22 which connects to btm buoy 12 secured by a plurality of latching mechanisms 38 arranged in an annular array btm buoy 12 supports a plurality of steel catenary risers 18 at their upper end mooring lines 16 which extend to anchoring means in the seafloor not shown connect to buoy 12 via connectors 14 which in the illustrated embodiment are pivoting connectors thus when connected fpso vessel 10 is releasably moored at the geo location of buoy 12 while being free to weathervane about buoy 12 on bearings 36 in response to metocean conditions fig1 shows buoy 12 in the connected state in the connection operation fpso vessel 10 is maneuvered over submerged buoy 12 and pull in line 28 is extended from winch 26 until bell housing 34 is latched to stinger 44 pull in winch 26 is then used to raise buoy 12 into turret cage 40 of turret 22 heave compensator 30 acting via pivoting arm 32 may be used to avoid snatch loads on pull in line 28 as buoy 12 approaches receptor 40 the heave motions of the two floaters become synchronized and buoy 12.