It is the Harbor Unit’s version of the mirrored device used by their colleagues on land to check for explosives under vehicles’ chassis. The department has six of these underwater drones, similar to those in use by the United States military and by oil companies with offshore operations.
Four, valued at $75,000 each, were acquired by the police in 2007, with federal grant money from the Urban Area Security Initiative. The police acquired two more sophisticated drones a year later with federal port security grant program money, for $120,000 apiece.
Read the rest of Al Baker’s article at The New York Times.