How to Prepare Your Dive Watch for a Dive
Getting your dive watch ready is part of preparing your gear before you enter the water. Is the time set correctly, and is there enough power reserve? Is the crown closed, does the bezel adjust properly, and does the band fit securely? A few careful steps to prepare your dive watch for a dive help ensure reliable timekeeping underwater.
A mechanical dive watch provides an additional time display that works without a battery. It is not a substitute for a dive computer, depth gauge, or pressure gauge, nor for proper training and dive planning. As a supplementary instrument, it can show elapsed time. On its own, however, it is not a complete backup for a dive computer because it provides no information on depth, no-decompression limits, or decompression.
Checking Your Dive Watch Before a Dive
Water resistance is not guaranteed to last indefinitely. Gaskets age, and impacts or wear can compromise their performance. Alongside its stated pressure rating, the watch's current condition is therefore crucial. A visual inspection can reveal potential damage, but it is no substitute for a professional water-resistance test.
If you regularly wear your watch in the water, annual testing is a useful guideline. Confirm the appropriate interval with the manufacturer or a qualified watchmaker, and allow enough time to arrange testing before a dive trip. After a hard impact, damage, or any opening of the case, water resistance should be tested again before the watch is used in water.
A rating such as 20 ATM or 200 meters of water resistance also needs to be understood correctly. It describes pressure resistance under test conditions, not blanket approval for every type of diving. What matters is the intended use and the manufacturer's guidance for your particular model. A high rating on the caseback is no substitute for testing or correct operation.
Inspecting the Crown and Case Carefully
Check the winding and setting crown before any contact with water. A screw-down crown must be properly and fully closed. Screw it in gently, taking care not to cross-thread or overtighten it. Unusual resistance, a crown that sits at an angle, or damaged threads should be assessed by a professional before the dive.
Also inspect the crystal, case, and bezel for visible damage. Light signs of wear are part of everyday life with a tool watch. Cracks, loose components, or the effects of a hard impact to the crystal or crown, however, call for a closer inspection. If you notice moisture or fogging under the crystal, have the watch examined promptly by a qualified professional and keep it out of the water until the issue has been resolved.
Only operate the crown or any pushers underwater if the manufacturer expressly permits it for that particular function. This also applies to watches with high water-resistance ratings. On watches with an internal rotating bezel, the additional crown used to operate it may be designed differently from the winding crown. Familiarize yourself with your model's instructions beforehand.
Winding and Setting Your Automatic Dive Watch
An automatic movement is wound by the motion of its rotor. After several days in storage, however, much of its power reserve may be used up. Even a watch that is already running may not be sufficiently wound. Wearing it briefly on the way to the dive center does not reliably indicate how much running time remains.
If the watch also supports manual winding, wind it before use as directed in the owner's manual. Turn the crown slowly and steadily in the appropriate position. The number of turns needed depends on the caliber. If you encounter unusual resistance or hear unexpected noises, do not force it; have the cause checked.
Next, set the time using a reliable reference. For models with a date display, note the time window specified in the manual during which the quick-set date function must not be used. Once all adjustments are complete, close the crown correctly. Ideally, take care of these steps without rushing, before the day of your dive.
How long a fully wound watch will keep running depends on its movement and power reserve. The stated maximum assumes a fully wound movement; without a power reserve indicator, there is no simple way to read how much running time remains. Check the specifications for your exact model variant rather than assuming it has the same running time as other watches from the same brand.
Setting the Dive Bezel and Checking Legibility
A dive bezel lets you read the time that has elapsed since the start. With a unidirectional bezel that turns counterclockwise, an accidental adjustment within the usual timing range makes the indicated elapsed time longer. This reduces the risk of underestimating how much time has already passed.
Just before descending, align the bezel's zero marker with the minute hand. You can then read the elapsed minutes on the bezel scale where the minute hand points. The bezel does not calculate no-decompression limits or decompression stops. If your dive computer fails, follow the emergency procedures you have learned and agreed on in advance; a watch alone is not sufficient to continue the dive.
Before the dive, check the bezel through its full range of rotation. It should turn smoothly and allow you to set it precisely. On a ratcheting bezel, each click should engage cleanly. Test it while wearing the gloves you will actually use. A bezel that is easy to grip when dry may handle differently when you are fully geared up.
The CiRCULA ProSea illustrates how these features work together: its unidirectional bezel has 120 clicks, and the minute hand and bezel scale feature color-coordinated lume. This makes it easier to match the hand to the scale. Pre-dive checks are still necessary for every dive watch.
After charging the lume, test the watch's legibility in low light. The minute and hour hands should be easy to tell apart, and the bezel's zero marker should be clearly identifiable. Luminous materials such as Swiss Super-LumiNova® need prior exposure to light and gradually lose brightness over time. A brief test in a dark room gives you an initial impression, but it does not fully reproduce underwater visibility conditions.
Adjusting the Band and Clasp to Your Dive Gear
Adjust the band while wearing the gear you plan to dive in. It needs to be longer to fit over neoprene than it does on a bare wrist. A dive extension, if fitted, or another suitable adjustment mechanism can make this easier. The band should hold the watch securely without digging in or allowing it to slip around.
A rubber strap designed for use in water is a practical alternative to a steel bracelet. With textile or hybrid straps, suitability depends on the specific construction and care instructions. What matters is a secure attachment, enough adjustment range, and a clasp that will not open accidentally.
Inspect the lugs, spring bars or screw-in fasteners, and clasp. After changing a strap or bracelet, make sure every connection is properly engaged or secured. Check the attachment by gently pulling on the band. Damaged or loose parts should be replaced or professionally secured before the dive.
Caring for Your Dive Watch After a Dive
Preparing for the next dive starts when you surface. After exposure to salt water, rinse the watch with clean fresh water, provided it is undamaged and suitable for use in water. Keep the crown closed. Following the care instructions, gently rotate an external bezel to help flush out salt and deposits. Do not force it or use a strong jet of water.
Then dry the case and band with a soft cloth. Avoid excessive heat, such as leaving the watch on a dashboard, as well as abrupt changes between hot and cold environments. Follow the appropriate care instructions for each band material. Make sure no salt residue remains, especially in gaps and around the clasp.
If the bezel still feels rough after rinsing, the crown sits differently than usual, or moisture appears under the crystal, have the watch professionally inspected. If you suspect a leak, do not rinse or submerge the watch again. Contact the service team promptly instead.
Make Preparation Part of Your Routine
Durability, clear legibility, and reliable operation are essential qualities in a dive watch. They also define CiRCULA's mechanical tool watches from Pforzheim. When using your watch, what matters is knowing how its functions work and checking its condition regularly.
Make these checks a regular routine: confirm the watch's condition and water resistance, wind it and set the time, close the crown, check the bezel, and secure the band. Your dive watch will then be ready as a supplementary timing instrument before the buddy equipment check and your planned dive begin.