Top business stories from nzherald.co.nz for Wed, Feb 18:

Key Points:

Auckland energy network company Vector is describing its latest half year profit of $90.8 million as "a steady result".

Infrastructure consultant Opus International Consultants has exceeded expectations with increased revenue and profits, up around 25 per cent for 2008.

Helicopter pilots heading out to emergencies across the US state of Texas will soon be working with kiwi-made instrumentation.

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Air New Zealand, facing falling passenger numbers, says it will "compete vigorously" with low fares and a high level of service against its newest domestic main trunk competitor, budget airline Jetstar.