Getting food and water at sea will be more trouble than on land, but you can still use some of the same methods.
food. Most of the distant sea fish are edible. Making your own hooks and lines can catch enough fish for you to eat. You can use a shoelace, a parachute, or a line drawn from clothes to make a fishing line. Small fish will gather in the shadows of the liferaft underwater, can catch them, use them as bait to catch larger fish. Make a fishing net to fish, crab, and shrimp. In the evening, some fish, especially flying fish, jump to life rafts and become your ready-to-eat food. In the evening, flashlights can be used to attract fish on the water. Using a mirror to reflect the moonlight onto the water can also attract fish. (See Chapter 7 for catching and cooking fish.)
Birds are sometimes attracted by life rafts and use life rafts as habitats. If a bird lands on a life raft, wait until its wings are completely closed before grabbing it. Or you can catch birds with bait hooks.
In the sea water away from the coast, seagrass sometimes floats on the water. Seagrass is rich in minerals, but if your stomach is not adapted to seagrass, it can cause severe diarrhea. You can only eat a small amount of seaweed at a time.
water. If there is a distiller on the liferaft, read its instructions for use and set the distiller immediately. If there is more than one distiller on the retort, the number of distiller should be set according to the needs of the person on board. Secure the distiller to the liferaft with a strong rope.
If desalination tools are available, desalination tools should be used when the distiller cannot be used and water is urgently needed.
Rain cloth can be used to collect rainwater. If there is a salt cream formed by the crystals of seawater on the rainproof cloth, it should be washed in the seawater so that there will not be too much salt on the rainproof cloth to endanger your health. In the evening, it is necessary to tie the tarpaulin in an umbrella shape with its edge part facing upward so that dew can be collected. When it rains, collect and drink as much rain as you can.
If the water supply is insufficient, use it economically and effectively.
Marine diseases and treatment methods
At sea, you may get seasickness or sea water sores, or you may encounter other physical diseases that may also occur on land, such as dehydration or sunburn. These problems can become very dangerous if not treated.
Seasickness is caused by nausea and vomiting caused by the liferaft's shaking. It may lead to -
â— Serious loss of body water and extreme fatigue.
â— Loss of will to live.
â— Other people also started seasickness.
â— Attract sharks near life rafts.
â— Other unknown circumstances.
When treating sea sickness -
â— Wash patients and life rafts to remove vomit and smell.
â— Let the patient keep eating until the symptoms of nausea disappear.
â— Let the patient lie down and rest.
â— If yes, take anti-sickness medication to the patient.
Note: Some survivors say that erecting the canopy or staring at the horizon can overcome seasickness. Some people also say that swimming with a life raft can help a person with seasickness for a while, but be careful when swimming.
Nasal sore is a wound pus that results from a continuous wound on the skin that touches the sea. The sores may be festering and pus, do not try to open the scrofula or squeeze pus. If there is fresh water, use fresh water to wash out the sores, and then allow the sores to air dry freely. If disinfectants are available, apply some to the sores.
Dehydration is caused by vomiting, diarrhea, decreased water intake, sweating, drinking alcoholic beverages, bleeding, urination, or drinking seawater. Regularly drink water regularly to save energy.
Constipation is a common disease on life rafts. Do not take laxatives because laxatives can make dehydration worse. Exercise as much as you can. If you do, drink plenty of water.
In the event of a plane crash, abandonment, or in the sea, the eyes may also be injured. If a foreign object enters one eye, both eyes must be bandaged because one eye movement affects the other. Do not try to remove foreign objects.
If fire tongue, smoke, dust or other contaminants enter the eyes, rinse the eyes immediately with seawater. If there is fresh water, rinse with fresh water. If there is, you should apply eye ointment. If the situation is serious, you should wrap up both eyes and wrap it together. 24 hours, or longer. If the sky and the light of the water make your eyes red and swollen, pack your eyes a bit. Wear sunglasses as much as possible to prevent this from happening. If you don't have sunglasses, you can do it yourself with a cloth or bandage (Figure 15-3).
Sunburn is one of the most serious injuries in marine life.
When people spend too much time in seawater below body temperature, it can cause hypothermia. Even on a life raft, if one feels cold, it may also trigger hypothermia. Symptoms and treatment of hypothermia have already been introduced.
Frostbite and foot soaking may also occur on liferafts.
Marine life
Whether you are in the water or on a boat, you may see a lot of marine life nearby. Some of them may have an impact on you.
shark. Sharks are marine creatures that may be related to you. Although there are more than 325 species of sharks, only about 20 species are currently known to attack humans. The most dangerous ones are white sharks, gray sharks, tiger sharks and hammerhead sharks. Other sharks that attack humans include gray sharks, blue sharks, lemon sharks, sand sharks, horn sharks, bull sharks, and white-nosed sharks.
Some large sharks, such as whale sharks and shark sharks, feed on plankton and are basically not dangerous to humans. However, any shark more than 3 feet or 4 feet (0.9 to 1.2 meters) in length should be considered dangerous. of.
Shark trails can be found in all oceans. Many sharks live and feed in deep water. Some sharks live near the water. You may find the latter because their high dorsal fins often protrude out of the water. Sharks often swim into shallow waters and even enter rivers and seas, but most sharks still operate in far waters.
There are also several kinds of sharks in the Arctic and Antarctic regions, but sharks that live between 40 degrees north latitude and 40 degrees south latitude are most likely to pose a danger to humans. Evidence shows that sharks in tropical and subtropical waters are more aggressive than sharks in temperate waters.
Most sharks generally feed on living animals. All sharks have greedy appetites. They use sight, smell or sound to find food. They study floating objects. Although shark-like food is a healthy animal, they are more likely to attack injured or weakened animals. Their sense of smell is well-developed and the blood in the water makes them excited. They are very sensitive to the vibrations in the water. The rebellion of the fish on the hook, the struggle of the injured or dying animal in the water, the movement of the uncoordinated swimmer in the water, and even the quick and fierce march of the other shark close to the prey, are more than the smell of blood. It's easier to attract sharks far away. They are also attracted by unusual sounds, such as underwater explosions.
When the shark opens its mouth and rushes to attack the prey, it can bite the opponent from almost any position without turning his body to the side. Great white sharks and other types of sharks, whose jaws extend long enough, can easily bite floating objects without twisting their bodies.
Sharks are more willing to bite smaller pieces from the human body in order to swallow, rather than bite off the person's entire leg or arm. They can bite a deep wound on the human torso, and they can bite a large piece of meat in one bite.
Most sharks' wounds are crescent-shaped. In the absence of shredded meat, there is often a clear bite left by smaller teeth.
Sharks may prey and attack alone, but most reports of shark attacks have mentioned more than one shark. Small sharks like to march in groups, attacking prey as well as attacking them. Once a shark discovers a prey, all sharks in nearby waters will immediately come and join the ranks of the attackers. Most sharks are similar to each other. They eat their own disability similar to eating other prey without hesitation.
Sharks are preying on food 24 hours a day, but recalling reports from survivors, most shark exposures and attacks occur during the day, especially in the evening, and the rate is higher. You can take some protective measures against sharks.
If you are in water -
◠Close to other swimmers. Several swimmers in a circle can observe the traces of the shark at 360°, better avoiding sharks than a single person. If you are attacked by sharks, several people will have stronger counterattacks.
â— Be alert to sharks. Always wear clothes, including shoes. Evidence shows that among a group of people, those who are partially naked are the first to be attacked, usually the feet. And, if sharks rub over your side, clothes can protect your skin from being scratched.
â— The urine should be discharged in a burst while urinating, so that urine can be dissipated in the urination gap. During stool, discharge a small amount of feces at once, and throw the feces as far as possible.
â— If you have to vomit, throw it on your hand and throw it as far as possible.
If it's in water and sharks are approaching -
â— Properly crafted to stop sharks so that you can save your energy and once the shark attacks, you have more energy to fight back.
â— Cry out loud underwater. Some divers say this method can sometimes scare away sharks.
â— Bring your fingers together, plunge, make cups, and then beat the water. This sounds loud and may scare away sharks.
â— You can use your feet and sticks to deal with sharks. If you can, beat the sharks under your arm or your eyes. If it hits its nose, it may slip over the nose, hit its teeth, and injure its own hand.
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