A new hi-tech long-range land attack missile has been successfully fired by a Devonport-based submarine. The new 'smart' Block IV Tomahawk missile was fired during a live firing trial off the US coast. The 5,200 tonne attack submarine HMS Trenchant used one of her torpedo tubes to launch the missile, which then flew over the Gulf of Mexico, striking a target hundreds of miles away with pin-point accuracy. During the 60-minute test fight the missile reached heights of 10,000 feet and speeds of 500 miles an hour. The enhanced weapon will improve the long-range precision capability of the Royal Navy...