A wooden board bill bill-post billboard chart column cut off cut-off hoarding panel pillar pinnacle plaque pole post sign table tablet wood wooden wooden board blackboard control controls off switch white button electricity on switcher architecture barrier bars blocking off cage closing off decorative defense fence forged gate historic iron jail metal parallel place prevent prison protection safety security sightseeing spears spiked steel symbol view wrought aeroplane air air/water vehicle aircraft airplane charter service drag fixed-wing aircraft floatplane floats flying fuselage plane pontoons sight-seeing single-engine sky speed take-off taxiing tourism tourist water water take-off weight