breathing apparatus breathing filters breathing mask danger dangers ear protection height high improvement lugger maintenance mask mast pearling lugger renovating renovation repairs rigger rigging risks risky ropes safety safety equipment safety harness tools tough work workman aerobridge aeroplane air-industry airbridge airline airlines airplane airport airport terminal connect connecting enclosed extending extends gate jet-bridge jetway moveable-bridge passengers security staff stairs steps tarmac terminal terminal gate travel travelers traveling travellers travelling tunnel walkway air aircraft aircraft cabin ceiling console cabin cabin lights ceiling communicating communication console cooling interior no smoking no-smoking sign passenger personal personal air personal light seat-belt sign signs air-travel aisle angles blur cabin-crew curved curves flight flying light lighting lines modern perspectives plane reading seating seats space speed transport transportation appearance confined display displayed engines equipment fence fenced-in heavy heavy-duty historical history locked locomotives machinery machines marshalling-yard mobility power rails railway railway-yard restoration restoration-yard restored steam-engines steam-locomotives steam-trains strength trains abstract angled architecture background backgrounds building buildings colors colours contrast diagonal edge edges gutter guttering historic lichen loose nails old overlap overlapping pattern roof roofing roofs rooftops rooves shape shapes slate steep style texture textures tile tiles vents activities artificial artificial structure ascend ascending belayer belaying climb climber climbing climbing harness climbing rope climbing technique climbing wall descend descending girl give outdoor sport portable wall shaped climbing holds sport structure surface take Tension youth arranged arrangement casual chaotic clamping clamps connected connectors disorderly disorganized engineering haphazard hollow irregular metal metalwork nuts-and-bolts pile piled pipes piping plumbing random rust rusting steel surfaces surfacing textured thread threading uneven unmethodical unsystematic variations variety weathered