Night diving offers a unique way to see a different underwater world. Many marine animals, including many sea creatures, are more active at night. This makes the underwater environment very different. You will need to be prepared for this unique diving environment. Before you dive, make sure you know what equipment you need and how to select a site.
Bioluminescence
By turning off your scuba torch, you can enjoy the wonders and beauty of bioluminescence while night diving. Simply wave your arms in the water and turn your scuba torch off. When you move your arms about the water, bioluminescent plantton will turn blue. This occurs when certain chemicals become vibrated and create light.
Many marine species use bioluminescence for communication and to attract mates. Syllid fireworms for example live under the seafloor in mucus tube and then return to the surface when the full moon is over.
Be aware
If you've never scuba dived at night, there are some precautions you should follow. Avoiding excessive light and using dive lights are two of the precautions. These lights could cause night vision issues for other divers. You may also be at risk of developing cardiac abnormalities by exposing yourself to the lights.
Not only should you limit your light exposure but also must you use a buddy partner. When night diving, a buddy partner is essential. A buddy can help you identify potential subjects. Before you dive with your buddy, make sure you practice hand signals. You should also make sure your buddy understands how to use the flashlight correctly. For instance, you should avoid shining light directly on subjects, but instead, aim it at the subjects' hands.
Equipment
Night dives require special equipment. Backup lights are essential. This type light is small enough that you can carry it in your pocket. You should also have a modeling light, which is a pinpoint light attached to a strobe. In the past, divers used chemical glow sticks to find their way back to the boat after the dive, but environmental concerns have led to a switch to battery-operated signal lights with different colored lenses.
The second is a quality dive light, and a compasse. Also, you will need to be able to communicate with other divers. Also, you will need to learn how to use your diving equipment's gauges. It is important that you feel safe diving at night. If you are not feeling secure, you should leave immediately. It doesn't matter if it is bad weather, lack of training, or unsafe water conditions. You might end up in a dangerous position. It is important to avoid using substances that could impair your ability to discern the truth.
Choosing a dive site
Night diving is best done at night. You don't want to complicate your first dive with new gear, carrying a camera, or diving deeper than usual. Your first night dive can be made easier by sticking to the basics. Start out in the twilight, and you can go deeper later.
You will need to research in order to choose the best night dive location. There are many aspects that you will need to consider. You'll need to look for a site where night diving has been done before. During the day, you can easily map out the dive site and get oriented. It is also easier to dry your equipment in the heat of the day.
Choose a night diving buddy
Finding a night dive buddy is difficult. The water changes quickly when the sun goes down, and you need to move slowly to avoid hitting objects. Also, the water is more cold than normal during the day so night divers must be warm. Feeling cold is something that no one wants. This can make diving unpleasant and uncomfortable.
Discuss your dive plan with your night buddy before you dive in the darkness. You should also discuss the order you would like to complete your dive. It is also important to discuss how you will communicate. This includes using hand signals and light signs.