PROBLEM TO BE SOLVED: To provide a means for continuously arranging floats at both sides of seat route solving the problem wherein since there is no continuity in marker buoys arranged with a predetermined space in order to show the seat route in a port, the sea route can be crossed, but a large size vessel navigating the sea route is likely to cause collision accident with a small size vessel crossing the sea route or caused it.;SOLUTION: In the in-port sea route guard float, the floats 1 of pipe body having predetermined length and having both ends closed by a closing plate are connected by a connection body 5 forming a state in which a support body is also filled in an inner diameter of respective rings while the support is interposed between the respective rings such that the respective rings made of metal and constituting a chain 4 made of metal in the support body by an elastic body are not directly abutted on each other. The connected respective floats are moored by a mooring rope constituted by an expandable/contractable spring rope and a constant length rope 11.;COPYRIGHT: (C)2006,JPO&NCIPI
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