What is that rotating dial on my watch used for? Well, first we have to fight out what bezel you have? There’s a few out there...
Count-Up Bezel/ Dive Bezel: (numbered 0-60) for counting elapsed time
Count-Down Bezel: (numbered 60-0) like a stopwatch, great for runners, bikers…
Tachymeter: (three small dials on watch face) used to measure the speed based on the amount of time traveled at a given distance.
Telemeter: for measuring the distance between the person and the location where an event is seen or heard. (Soldiers use this to gauge the distance between them and the enemy fire, or how far away a lightning strike is)
GMT Timezone Bezel: (24 hour markings on bezel) The GMT bezel can be set to the time zone of where you are traveling to, so you don’t have to re-adjust the watch hands.
Compass: (North, South, East, West markings) It is not magnetized nor electronic so THIS WILL ONLY WORK IF YOU HAVE THE SUN AND KNOW WHAT YOU’RE DOING!
Pulsometer: outdated now but once used in the early 1920s by medical doctors and nurses to estimate a patient’s heartbeat rate through a scale marked on the bezel.
Sliderule: Used for a lots calculations such as speed, distance, flight time, multiplication, exponents, logarithms, fuel consumption... However, one of the most complicated bezels.
I’m going to show you how to use one of the most common bezels - the Count-Up, Timing or Dive Bezel. These bezels can be used to time anything but are mainly used for timing dives.
(We use them on hikes as a backup timing device from our electronic equipment. And for timing timelapses.)
Most of these bezels only have markings up to 60 on them so can only time up to an hour.
These bezels can only rotate in an anti-clockwise direction - a feature designed so that minutes can’t be deducted accidentally… a fatal mistake if underwater.
To count up:
Step 1:Align the top of the bezel (usually an arrow where the 60/0 is) with the minute hand.
Step 2: Read the minute hand against the newly aligned bezel to count the minutes.
To count down (elapsed time):
Step 1: Figure out how long you want timed (let’s say 20 minutes)
Step 2: Subtract that time from 60 (so 60-20 = 40)
Step 3: Find the answer on your bezel and roll it to where the minute hand currently is (so place 40 at the minute hand)
Step 4: When the minute hand reaches the illuminated marker 20 minutes has passed.
For those who have been watching The Crew, will know Viv is a bit of a watch aficionado and The Crew has subsequently been sponsored by Momentum Watches - a tough brand of timekeepers that can handle the austere environments we film in.
For those interested, we’ve reviewed all the watches we currently wear here: