31417327water transportation structuresPT2026-03-30 20:52:18UF31417328structures, water transportationNDUF31417329water transportation structureNDBT31381299transportation structures by functionPTNT31442846landingsPTNT31378276boat launching rampsPTNT31442854mooringsPTNT31442858dolphinsPTNT31442860dry docksPTNT31442867floating docksPTNT31442872wet docksPTNT31442876portagesPTNT31442878guidewallsPT