“port asset” means any port terminal, breakwater, sand trap, berth, quay wall, bollard, graving dock, slipway, single point mooring, dolos, fairway, surfacing, wharf, seawall, channel, basin, sand bypass, road, bridge, jetty or off-dock container depot, and includes any earthworks or supporting structures forming part of such terminal, breakwater, sand trap, berth, quay wall, bollard, graving dock, slipway, single point mooring, dolos, fairway, surfacing, wharf, seawall, channel, basin, sand bypass, road, bridge, jetty or depot and any improvements thereto.