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
A customs X-ray scanner vehicle at Rosslare Europort in Co Wexford, waiting the arrival of the Stena Line ferry after 16 people were discovered in a sealed trailer on the ship sailing
Laser Scanning on the Alaska Marine Highway – Westlake Consultants
Scanner, v. 8, n. 9 (Mid-Summer 1976) : Hail To The Trillium
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
Improved security at Ferry Terminal - dbstvstlucia
Tallink launches first ever self-service checkout on board ferry