Night diving is an excellent way to get a glimpse of a totally different underwater world. Because many marine animals are nocturnal, the underwater environment changes at night. You will need to be prepared for this unique diving environment. Learn more about what equipment you will need and how you can choose a diving site.
Bioluminescence
Bioluminescence can be experienced during night dives by simply turning off your torch and waving in the water. When you move your arms about the water, bioluminescent plantton will turn blue. This happens when certain chemicals are vibrated and produce light.
Bioluminescence is used by many marine animals to communicate with one another and attract mates. Syllid fireworms, for example, live below the seafloor in mucus tubes. They then head up to the surface at the full moon.
Take care
If you've never dived at night before, there are several precautions that you must follow. Avoid excessive light exposure and avoid using dive lights. These lights may cause blurred vision in the night for other divers. Exposed to these lights could increase your risk of having cardiac irregularities.
You must use a buddy group to limit your light exposure. Night diving is more challenging without a partner. A buddy can help you identify potential subjects. Before you dive, practice hand signals with your buddy. Your buddy should be able to correctly use the light. You should not shine light directly onto subjects. Instead, aim the light at their hands.
Equipment
Special equipment is necessary for night dives. You should ensure that you have backup lights. This type light is small enough that you can carry it in your pocket. A modeling light, which attaches to your strobe, is also a good option. 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.
A compass and a good dive light are also essential. It is important that you have a light that can communicate with other divers. Additionally, you must be familiar with the functions of your diving rig's gauges. Finally, you should feel comfortable diving at night. You should immediately get out if you feel unsafe. It doesn't matter if it is bad weather, lack of training, or unsafe water conditions. You might end up in a dangerous position. Avoid substances that affect your ability to judge.
Selecting the right 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. It will be easier to get comfortable, and your first night dive will go well. You can begin by diving at night and move deeper later.
It is important to do your research before you decide on the night dive site. 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. The day allows you to easily locate the dive site and navigate around it. You can also dry your equipment more quickly and warmer during the day.
Choosing a night dive buddy
Finding a night dive buddy is difficult. You must be cautious when diving at night as the water changes very quickly. Even though the water is colder at night, it should be warmer. Being cold can make it uncomfortable and unpleasant.
Before diving in the dark, discuss your dive plan and any special instructions with your night dive buddy. This includes the order in which you want to complete the dive. Talk about how you will communicate.