Two small tug boats waiting to assist the giant vessel Marstal Maersk to guide the vessel to her berth while passing the helicopter platform at dead slow speed in the Maasgeul

tug boat waiting assist giant vessel marstal maersk berth passing helicopter platform slow speed maasgeul ais engine double propeller windmill blue maersk line port rotterdam port of rotterdam container carrier ship shipping import export economy lashing securing freight rates loaded draft depth laden cargo boxes globe transport transportation teu tons entering navigate