Yellow pillars at international ferry ports and channel tunnel terminals. I assume some sort of scanner, but what precisely do they scan for/with? : r/whatisthisthing
Ships Radar On Gozo Ferry Stock Photo - Download Image Now - iStock
Panel-Mounting the Home Patrol Scanner - Nomadic Research Labs
Newport News Norfolk Chesapeake & Ohio Ferry Boat 1930 VA | United States - Virginia - Other, Postcard / HipPostcard
Mawa, Bangladesh. 6th Aug, 2014. Bangladesh Tugboat Kandari-2 with powerful sonar scanner searches the location of the sunken ferry in the water on the Padma River in Munshiganj district, some 37 km
Scanners installed for oversize vehicles at Horseshoe Bay ferry terminal - North Shore News
Ferry passengers arriving from Singapore walk past a thermal scanner... News Photo - Getty Images