Are you aware that a chief engineer's responsibility is the efficient and economical operation of his ship's drive mechanism?

The most economical operation is conducted upon a cylindrical podium ten feet high.

Methane recovery is critical to the economical operation of an ethylene plant.

Their economical operation and long lifetimes make their higher initial cost normally well worthwhile.

The Class 19 family earned a reputation for reliability, easy handling, long periods between overhauls and economical operation.

Severe vibration had caused critical stress corrosion of the airframes to the point that the aircraft was beyond economical operation any longer.

Thus drag and fuel costs are reduced allowing economical operation even on smaller aircraft like business or regional jets.

While Kia now offers a dash of style, it hasn't forgotten the real reasons its sales have been rising: good value and economical operation.

Conduct performance audits to identify opportunities to save resources by; recommending best practices for more efficient and/ or economical operations.

"This is seen as an economical and ecologically sound alternative operation."