At the Pedro Miguel Locks close to Panama City the day before the referendum to add a third lock to the canal ACP workers move cargo ships through the locks with help from the Linemen aka Pasacable Caballeros and the Boateros aka Boatmen.At the Pedro Miguel Locks close to Panama City the day before the referendum to add a third lock to the canal ACP workers move cargo ships through the locks with help from the Linemen aka Pasacable Caballeros and the Boateros aka Boatmen. Also included is a view of the Puente de Centenario as seen from the North end of the locks.