English to Spanish Tech/Engineering Other safety procedures on a container terminal

When working with the safety flat 1 person is in charge and has radio contact with the crane driver and visual contact with his colleagues
Always attach the second security (the chains) to the spreader

The safety flat must be placed on a stable subsoil
Attach the self-retracting lifeline foreseen points in the flat
Attach the harness to the self-retracting lifeline
Never jump from the cage
Look where you walk
Keep in mind that there might be height differences (high-cubes, ..), tarpaulins, ..