[yazhound]

I fly regularly as part of my job. Most important measurables are done via the on board electronics. Those included with all important navigation are fuel use, speed etc..

Prior to the emergence of these "electronic tools" a chronograph with a slide-rule was often used to make all important calculations taking into account all these factors. An indispensible tool, with the slide rule much more than simply a watch or a stop watch.

My father flew hueys for two years in Vietnam, earning numerous Air Medals, Bronze Stars, and eventually a Distinguished Flying Cross. He wore a Breitling Navitimer because it offered the ability to make the necessary calculations, especially with the slide-rule. He went through several leather bands that gave up the ghost because of sweat and humidity. Later attached to the USAF 33rd TFW he flew F4s and was first Army guy to have his name on F15.

Still has the watch, since back to new via Breitling. A true classic, and much much more than a mere stop watch.