![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 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](https://c8.alamy.com/comp/E5X30E/mawa-bangladesh-6th-aug-2014-bangladesh-tugboat-kandari-2-with-powerful-E5X30E.jpg)
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
![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 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](https://c8.alamy.com/comp/2AAE4J1/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-from-france-2AAE4J1.jpg)
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
![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 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](https://external-preview.redd.it/Kh8ocVPVZ7brHt5tpwSYjptNtfQ_5pf8v8SHvKo-3UU.png?auto=webp&s=2c096a5f8a3ed957832ec9524705a8fad5349669)
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
![Newport News Norfolk Chesapeake & Ohio Ferry Boat 1930 VA | United States - Virginia - Other, Postcard / HipPostcard Newport News Norfolk Chesapeake & Ohio Ferry Boat 1930 VA | United States - Virginia - Other, Postcard / HipPostcard](https://storage.googleapis.com/hippostcard/p/8feb2f62810b5eb92d6aa21d77a33ef1-800.jpg)