The Directions for the 100 Ft. WR Watch

    Look for a meter marking on the case, dial or in the documentation to verify the water resistance of your watch. This is sometimes abbreviated to "WR_M." Watches are often capable of 100 feet, 100 meters or 200 meters. Hundred-feet WR watches are not diving watches. Use a watch designated as a diving watch for diving.

    Fasten the watch to your wrist tightly and begin to swim. Don't press any buttons or pull the crown out underwater unless the watch documentation indicates you can. For example, Timex's 200-meter WR watches can, but Timex's 100-feet WR watches can't.

    Rinse the watch under fresh water when returning. This is particularly important after swimming in salt water.


  • Pressure is measured in pounds per square inch absolute (PSIA). A watch with a water resistance depth of 98-feet can handle 60 PSIA. A 100-meter designation handles 160 PSIA and a 200M watch will perform to 284 PSIA.

About the Author

Patrick Nelson has been a professional writer since 1992. He was editor and publisher of the music industry trade publication "Producer Report" and has written for a number of technology blogs. Nelson studied design at Hornsey Art School.