Amachinedesigned to use the fusion-piercing mode of producing holes in rock. Also known as det drill; jet-piercing drill; Linde drill.


Related Terms

OFF-LINE

1. A condition existing when the drive rod of the drill swivel head is not centered and parallel with the borehole being drilled. 2. A borehole that has deviated from its intended course. 3. A condition existing wherein any linear excavation (shaft, drift, borehole) deviates from a previously determined or intended survey line or course. 4. State in which an equipment or subsystem is in standby, maintenance, or mode of operation other than online.

INDEPENDENT CONTRACTOR

One who exercises independent control over the mode and method of operations to produce the results demanded by the contract.

TRANSSHIPMENT

The unloading of cargo at a port or point where it is then reloaded, sometimes into another mode of transportation, for transfer to a final destination.

PIGGYBACK

A rail transport mode where a loaded truck trailer is shipped on a rail flatcar.

DIRECTIONAL GYRO MODE

The mode of operation of a gyrocompass in which the compass operates as a free gyro with the spin axis oriented to grid north. directional radiobeac

PROPORTIONAL CONTROL

A mode of control in which there is a continuous linear relation between value of the controller variable and position of the final control element (modulating control).

RANGING MODE

A mode of operation of a radionavigation system in which the times for the radio signals to travel from each transmitting station to the receiver are measured rather than their differences as in the HYPERBOLIC MODE. Also called RHO-RHO MODE, RANGE-RANGE MODE.

CRUISE SHIP

A passenger ship used for pleasure voyages, where the voyage itself and the ship's amenities are part of the experience, as well as the different destinations along the way. Transportation is not the prime purpose, as cruise ships operate mostly on routes that return passengers to their originating port. A cruise ship contrasts with a passenger liner, which is a passenger ship that provides a scheduled service between published ports primarily as a mode of transportation. Large, prestigious passenger ships used for either purpose sometimes are called ocean liners.

MODAL INTERFERENCE

Omega signals propagate in the earth-ionosphere wave guide. This waveguide can support many different electro- magnetic field configurations, each of which can be regarded as an identifiable signal component or mode having the same signal frequency, but with slightly different phase velocity. Modal interference is a special form of signal interference wherein two or more waveguide modes interfere with each other and irregularities appear in the phase pattern. This type of interference occurs predominantly under nighttime conditions when most of the propagation path is not illuminated and the boundary conditions of the waveguide are unstable. It is most severe for signals originating at stations located close to the geomagnetic equator. During all daylight path conditions, the only region of modal interference is a more-less circular area of radius 500-1000 kilometers immediately surrounding a transmitting station.

INTERMODAL SHIPMENT

When more than one mode of transportation is used to ship cargo from origin to destination, it is called intermodal transportation. For example, boxes of hot sauce from Louisiana are stuffed into metal boxes called containers at the factory. That container is put onto a truck chassis (or a railroad flat car) and moved to a port. There the container is lifted off the vehicle and lifted onto a ship. At the receiving port, the process is reversed. Intermodal transportation uses few laborers and speeds up the delivery time.

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