[Demonstrate some damages of poisonous sea animals]

The sea similar of other earth environments have very different animals that life in them and any of that living beings have special characters. Notification about this special characters for all divers were necessary. Perform successful operation depend on this important and intelligent awareness. This study collected based on any books, articles and knowledge be about marin. Sea animals divided in two major group: poisonous and non poisonous Poisonous sea animals such as sea snake, stone fish, Portuguese Man-O" War, chironex and etc use of their toxins for defence. Sign and symptoms that produced by toxins are vary such erythema, endoration, pain or itching to anaphylactic shock and death. Contamination by toxins occur on two forms: active and passive. Complete explanation of this suggestion are reachable at this study. With pay attention to importance of poisoning prevention and their harmful complications, be awareness of sea animals characters for divers, swimmers and naval officers were seem necessary

[Conversancy with oxygen and its production instrument in military aviation and seafaring]

The most important qualification of aviation at flight altitude over tenthousand feet and sub aquatic seafaring [in all deeps] are the effective oxygen production instruments which have the worthwhile role in prevention of hypoxia and hyperventilation. These systems were used invention in First World War and greatly improved since this century. Informed about this systems and their introduction, function and probable failures are very necessary. This study documents collected based on any books, articles and knowledge about marine. Oxygen generator systems produce this gas as a shape of gas, liquid and chemical compounds. All the oxygen generators consist of two major sources: main source and back up source which help on emergency situations. Function of this system was based on two methods: automatic and manual operation. Relative appurtenants such as connecting pips, regulators, air dilution systems and masks have accurate points depend on their facilities. Best part of their functions are air dilution ability, generation of 100% oxygen, positive pressure breathing and suitable oxygen temperature. Progressive development of aviation and seafaring technology and up to date investigations implicate enough flight and sea crew orientation about oxygen and its equipments for hypoxia and hyperventilation prevention