Glossary of Watch Terms.

depth alarm: An alarm on a divers' watch that sounds when the wearer exceeds a pre-set depth.

depth sensor/depth meter: A device on a divers' watch that determines the wearer's depth by measuring water pressure. It shows the depth either by analog hands and a scale on the watch face or through a digital display.

dial: The watch face

diameter: the width of a circular or round case. At WorldofWatches.com, the case diameter is measured between the 2 o'clock to 7 o'clock hours. Some manufacturers measure a watch�s diameter between the 3 o�clock to 9 o�clock points on the watch bezel, providing a different size measurement. Non-circular cases...tank, square, oval and rectangular styles...are measured by their width across.

digital watch: A watch that shows the time through digits rather than through a dial and hands (analog) display

diving watch: A watch that is water resistant to 200M. Has a one way rotating bezel and a screw-on crown and back. Has a metal or rubber strap (not leather). Has a sapphire crystal and possibly, a wet-suit extension.