top of page


A watch marked with 50 meters on the dial or case back doesn't mean it can be used diving to a depth of 50 meters. The rating refers to the static pressure it can withstand. The pressure arises when it is moved under water when swimming, the pressure on the watch varies, and can cause seals to fail, and water to enter the watch. Most water resistant watches are not designed for prolonged active use in water.

For swimming and diving, there is a specific range of watches that are clearly marked as  200 - 1000 M+, this means they are rated for use underwater and have seals and systems to handle such pressures. 

Water resistance is stated as a depth ( ATM or Meters ) this means that it has been tested in a laboratory to with stand a static pressure for a short period only at the stated depth. The actual water pressure on the watch during use is greater than the static pressure. Diving into a pool for example, the pressure on the watch is greater at the impact point with the water.

Certain chemicals in water can damage the watch seal as well as perfumes, aerosol sprays and other cosmetics.

We recommend not wearing your watch in the shower or a sauna. As the heat differences can cause problems. 













3 ATM, 30m, 100ft

Suitable for everyday use. Will withstand accidental splashes but not suitable for swimming.


5 ATM, 50m, 165ft

Suitable for everyday use and bathing but suitable for light swimming.


10 ATM, 100m, 330ft

Suitable for everyday use and swimming and snorkeling, scuba diving, but NOT suitable for high board diving.


20 ATM, 200m, 660ft

Suitable for all high impact water sports and scuba diving at depths not requiring helium gas. At these depths it is recommended to purchase a professional dive computer.


20 - 50 ATM, 200 - 500m

Suitable for all high impact water sports, scuba diving and saturation diving.


100 ATM, 1000m+

Suitable for deep sea diving and interstellar travel. 

Watch Waterproofing


We employ a number of different machines specifically manufactured for service centre use.

They give us the ability to test watches up to a depth of 1250 meters.

All our machines are service centre approved and all tests done onsite. 

bottom of page