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Visibility during the divePoor visibility can occur for many reasons such as failing light, a particularly shady area or if you are diving in caves. Whatever the reason for the limited visibility there are several points you should consider:Diving if you have poor eyesight Divers that have to wear prescription lenses often miss out because of their inability to see all underwater life in true focus. Divers need to be able to see not only close objects such as their equipment but also at a distance, prescription lenses and even those who wear bifocals are available for face masks with the majority of them being bonded into the mask. Contact lens wearer If you are a contact lens wearer and you intend to go diving in your lenses then you should makes sure that you blink a lot, if you don't then bubbles can begin to form underneath your lenses and this can be very uncomfortable and cause problems with your vision. The other problem with contact lenses is if your mask should flood then you could lose the lenses, you should prevent this by closing your eyes when you clear your mask. Diving in poor visibility There are many reasons why there could be poor visibility of your dive and whatever the reason you shouldn't let it affect your dive, there are a few simple tips you should follow to maximize your dive where vision is limited: * During your descent avoid getting disorientated by using a shot line or anchor line. * Try not to hit the bottom as you will stir up silt and this will only make visibility so much worse. * Take a pause and let your eyes adapt to the poor visibility you may find that when they adapt you can see more than you thought. * Consider using a buddy line or if the visibility is really bad then hold hands. * If getting back to the shot line is important due to very poor visibility, then tie a distance line to a nearby point and reel out your buddy using this line. * If you are using compass bearings always believe them regardless of whether you think you were going in a straight line, poor visibility can be very disorientating and the compass never lies. * Always check your depth gauge and pressure gauge often, it is easier to drift shallower or deeper without realising in poor visibility. * If you do become disorientated during your dive then close your eyes briefly, relax and take a deep breath and don't panic, if you start to panic you will hyper ventilate and this will cause you to use more air. * Limit the amount you move around, settle down in one spot and focus on the detail you can see. |
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