This type of trenchers is another type of chain trencher. It has similar characteristics to bucket-wheel excavators and trenchers. The reburial was done crudely, using heavy mechanized vehicles such as trenchers and baggers. Its 1,100 employees project manage and operate a fleet of Vessels, ROV's and subsea Trenchers. Wheel trenchers may be mounted on tracks or rubber tires. Trenchers were as much the harbingers of open-face sandwiches as they were of disposable crockery. In medieval cuisine, slices of stale bread, called trenchers, were used instead of plates. Marais or "Groupe Marais" manufactures trenchers for both rural and urban areas. In Virgil's "Aeneid", trenchers are the object of a prophecy. At present, MARAIS line includes mainly wheel trenchers, chain trenchers, and micro trenchers. Micro trenchers are used to minimize traffic or pedestrian disturbance during network laying. The trench, however, was renovated in 1988 using trenchers to repair the damaged sections. It is cheaper to operate and maintain than chain-type trenchers. Members of the University Council wear black trenchers with silver tassels. Black cloth trenchers are worn by all graduates below the rank of Doctorate.