Launch Reading the ground Identifying the target Hitting the target Future technology BGM-109 Tomahawk

The main cruise missiles in the US arsenal - and the sort the British have on fleet submarines - are Tomahawks, made by the Raytheon company of Tucson, Arizona.

These are the key components:

[1] infrared imagery sensor
[2] guidance system
[3] warhead
[4] digital scene matching illuminator
[5] main fuel tank
[6] terrain matching system
[7] turbojet subsonic engine