Night diving offers a unique way to see a different underwater world. Because many marine animals are nocturnal, the underwater environment changes at night. Preparing yourself to dive in this unique environment is key. Learn about the equipment that you will need, and how to choose a dive spot.
Bioluminescence
When you turn off your scuba flashlight and wave your arms in water, you can witness the wonders of night diving bioluminescence. Bioluminescent plankton will light up blue as you move your arms around the water. This phenomenon is caused when certain chemicals react with vibration to generate light.
Many marine life uses bioluminescence to attract mates and communicate with each other. Syllid Fireworms, for instance, live under the ocean floor in mucus tubes. After the full Moon, they return to the surface.
Precautions
There are several precautions you should take if you have never dived at night. Avoiding excessive light and using dive lights are two of the precautions. These lights can affect the night vision of other divers. Exposure to these lights can also increase your risk for developing cardiac problems.
You must use a buddy group to limit your light exposure. When night diving, a buddy partner is essential. Your buddy will be able to help you identify potential subjects. Be sure to practice hand signals with your partner before you go on the dive. Your buddy should be able to correctly use the light. To avoid direct light on the subject, instead aim it at them with your flashlight.
Equipment
You will need special equipment if you plan to do a night dive. First, ensure you have backup lights. This type is often small enough to fit in your pocket. A modeling light is a pinpoint-light attached to a flasher. Divers used to use chemical glowsticks to guide them back to the boat. But environmental concerns led to the introduction of battery-operated signal lamps with different colored lenses.
Secondly, you must have a quality dive light and a compass. A light that allows you to communicate with other divers is also essential. You will also need to know how your diving rig works. 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. Avoid substances that affect your ability to judge.
Selecting a dive site
Night diving is best done at night. Do not complicate your first dive by carrying extra gear or going deeper than normal. It will be easier to get comfortable, and your first night dive will go well. 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 factors to consider when choosing a night dive site. If night diving is something you are new to, it's important that you choose a dive site that has a long history of night diving. The day allows you to easily locate the dive site and navigate around it. It's also warmer and easier to dry off your equipment during the day.
Choosing a night dive buddy
It can be hard to find a night-diving buddy. It is important to slow down and avoid hitting things as the water changes rapidly when the sun sets. The water is also colder than during the day, so a night diver must be extra warm. Being cold can make it uncomfortable and unpleasant.
Your night dive buddy should discuss your dive plan and any special requirements before you go. This includes the order in which you want to complete the dive. Talk about how you will communicate.