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In-line engine
Straight in-line engine is the normal type of engine with all cylinders in-line as opposed to tilted position of V-engine or opposite position of boxer engine.
Intercom headset
Crash helmets have in-built intercom for use in the stages but for road sections crews use light-weight intercom headsets which are more comfortable. Modern intercoms are coupled into radio and mobile phones, allowing crew to talk to team with a push of a button.
Intermediate tyre
A tyre intended to be used in damp or humid conditions. It's surface is less heavily grooved than that of a full rain tyre and compound can be harder.
ISC
International Sportsworld Communicators. A company that holds commercial broadcasting rights to World Rally Championship. ISC was bough in April 2000 by investor consortium headed by David Richards, owner of Prodrive. Since then ISC has moved WRC coverage forward a lot and while many have criticised certain measures taken, breadth and depth of WRC coverage and it's public image have taken quantum leap from turn of the millenium.
In 2008, ISC was chosen as the global promoter of the sport, allowing it to relatively independently make agreements beyond the commercial exploitation.
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Typical intercom headsets
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ISC trucks provide sophisticated facilities for producing high-quality TV coverage from each WRC event
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