Abstract: A mooring method includes the steps of: transporting a mooring member having a mooring cable which can be connected to a float at one end and an accommodation member installed at the other end of the mooring cable and has an accommodation space therein to a mooring position of the float; accommodating a first heavy weight in at least a part of the accommodation space of the accommodation member at the mooring position; connecting the one end of the mooring cable to the float at the mooring position after the accommodation step; and accommodating a second heavy weight in the accommodation space of the accommodation member by adding the second heavy weight to the first heavy weight or exchanging at least part of the first heavy weight with the second heavy weight at the mooring position after the connection step.

Abstract: A mooring method includes the steps of: transporting a mooring member having a mooring cable which can be connected to a float at one end and an accommodation member installed at the other end of the mooring cable and has an accommodation space therein to a mooring position of the float; accommodating a first heavy weight in at least a part of the accommodation space of the accommodation member at the mooring position; connecting the one end of the mooring cable to the float at the mooring position after the accommodation step; and accommodating a second heavy weight in the accommodation space of the accommodation member by adding the second heavy weight to the first heavy weight or exchanging at least part of the first heavy weight with the second heavy weight at the mooring position after the connection step.

Abstract: The invention provides an organic glass for optical parts, in which the main polymer component is constituted by a bipolymer consisting of (a) a diallyl ester of diphenic acid, and (b) an urethane acrylate having vinyl groups introduced into both its ends by the reaction of a chainlike polyurethane having hydroxyl groups at both its ends, obtained by the reaction of a diisocyanate component with a diol component, with acrylic or methacrylic acid. This organic glass for optical parts has a high refractive index and excels in transmittance, impact resistance and other physical properties as well, so that it can be applied to optical parts to which only inorganic glass has been applied so far in the art.