| There are many features found on a diver watch | | | | of the dive. Many modern day watches with 15 or 20 |
| that vary between watch makers, but all genuine | | | | minute markings on their bezels have copied the |
| diver watches must comply with ISO 6425, meaning | | | | Rolex bezel design that was popular back in the |
| that some features that are standard on all watches. | | | | 1950s. Divers back then would plan their dives based |
| Here is a list of a few of them: | | | | on US Navy dive tables, diving according to the |
| The Diver Watch Case | | | | planned dive profile. The bezel is only used on analog |
| The case of a diving watch must be tougher than | | | | dive watches, digital dive watches perform this |
| the case of a normal sports watch as it must be able | | | | function using an internal computer amongst their |
| to withstand the extreme water pressure and | | | | many other features like depth gauge and logging. |
| corrosiveness of seawater. Diver watch cases are | | | | Strap/bracelet |
| typically made out of materials that possess these | | | | A diver watch features a silicone rubber, |
| qualities such as ceramics, synthetic resins, stainless | | | | polyurethane, rubber or metal strap bracelet that is |
| steel, titanium and plastics. Additionally, the case must | | | | of adequate length to wear over a bulky wet suit |
| protect the internal workings of the watch from | | | | sleeve. Many bracelets feature a concealed extension |
| shocks and magnetic influences. | | | | deployment clasp that can extend the size of the |
| Elapsed time controller or Rotating Bezel | | | | bracelet by an appropriate amount when needed. |
| All analog diver watches feature a rotating bezel that | | | | Diver Watch Crown |
| only turns one way. The bezel is used to measure | | | | The crown is a sensitive area of a diver watch, that |
| the elapsed time of a dive from a specific point in | | | | could easily flood without a mechanism to make it |
| time. To use the bezel, turn until it aligns the zero | | | | water resistant. Many crowns are required to be |
| with the watch's minute hand. As the dive | | | | screwed in when diving and unscrewed to make |
| progresses, the elapsed time can be read from the | | | | adjustments to the date, time or other watch |
| bezel, saving a scuba diver from the need to | | | | settings. Screw-down locking crowns and crowns |
| perform mental arithmetic in their head. The reason a | | | | that are traditionally operated can not be used |
| bezel must only turn one way is so as not to | | | | underwater. |
| inadvertently increase the perceived length of time | | | | |