Abstract
The Caspian Sea surface has undergone many changes and fluctuations. As the sea level has changed, many postal land has fallen underwater or parts of shallow coastal waters have left the water. In the past ten years, due to changes in the surface water of the Caspian Sea and the drop in water, a number of historic ships have been revealed. Identifying several wooden logs on the banks of Talesh, Rudsar, Neka and the Gulf of Gorgan will provide valuable information on the structure of the Caspian Sea historical ships and shipping. In this paper, which is based on field research and library study, Introducing historic ships that have emerged due to sea-level changes, the lack of older prototypes in this closed sea-due to the absence of monsoon winds, irregular wave movements, the absence of neighboring civilizations, And, consequently, the absence of maritime business routes, the progressive and sequential return of seawater and other factors will be studied. This wood is an imported product and now it comes from Russia to Iran. The oil found in the wood chips seems to have the stability of wood in the presence of water. The drilling of the lower parts of the ship showed that the body of the ship was saturated with water and its texture was sponge-shaped. The enclosure of the Neka coastal shores is made from wood-framed wood of the needle leaf trees, and puts outer-wall nails to vertical beams and internal walls.
Keywords: Changes in Sea Level, Caspian Sea, Historic Ships, Sunken Ship.

Introduction
With the change in the sea level of the Caspian Sea, during recent decades, a number of historic ships have escaped from the water and exposed to the air. The most important historical ships identified on the southern shores of the Caspian Sea are as follows: 
Ships of Talesh: About 500 meters from the old site of the Gorganroud Harbor, the remains of the ship’s broken ship are located at the seafront, most likely in relation to the port of Gorganroud. The length of the ship’s remaining length is approximately 20 meters and the width is about 5 meters. It looks like the ship is slightly left-hanging between the sand and sand beach and perpendicular to the sea. Most of the lower parts of the ship seem to be healthy, but the front of the ship is likely to be broken and slightly angled toward the body. Because of the withdrawal of seawater, the ship has been evacuated and exposed to open air and sea waves, which has put the structure in an emergency. Of course, the damage to this ship is not limited to environmental damage and damages caused especially to severe burns in the anterior part of the ship due to deliberate fire. The upper part of the ship and its deck have generally disappeared, and what is seen on the sandy beach and on the edge of the water is its lower part, most of which are buried beneath the beach. The exact study of this structure requires archaeological exploration and the liberation of the ship from the subsoil. The tangible volatility of the sea level in the coastal strip of the Mazandaran Sea and its changes on the banks of the city of Talesh have caused the ship to come out of the water. The wood used in the construction of this Siberian tree will help to identify the site of the ship.

Caspian Sea Historic Ships
Chamkhaleh Historical Ship: in the vicinity of the village of Lall-e-Rood and about 7 km north of Rudsar, the functions of the Langrood city in the east of Gilan province have been revealed by the remnants of a wooden ship due to climatic changes, including changes in the surface of the Caspian Sea and the flooding of the river.  The ship is located at a short distance from the sea and in the estuary of the Langrood River, standing in a northern direction. The ship, which was buried under the coastal waters, was revealed by the outbreak of the Langrood River. The bulk of this ship is still buried under the coastal spit, and only part of its nose is visible near the river’s water. Considering the size and size of the observable, it is possible to consider the length of the ship’s historic ship, about 30. Neka Historical ship: An archery ship on the coast of Mazandaran, which has been explored in recent years, is located in the village of Zagmarz and approximately one kilometer southwest of the Miankaleh Inland. The ship is 26 meters long and 6 to 7.5 meters wide, perpendicular to the coastline. The upper surface or deck of the ship, the shelter or the deck wall and a large part of the sailing mast have been lost over time due to the presence of sea waves and only its lower spaces are left. The ship is located in the direction of the northeast, southwest, and is located on the mainstream wind of the Mazandaran Sea. The wood used in the ship is from the family of long-tailed leafy trees and is the closest family to the wood. 

Conclusion
Based on archaeological studies and historical sources, shipping and navigation in the Mazandaran Sea began in the Safavid period, and before this period, there is no evidence of historical ships and commercial ports. The main reason for the lack of shipping and maritime business in the Caspian Sea prior to the Safavid period was the absence of monsoon winds for sailing ships and irregular winds and waves in it. The fluctuations in the level of the sea level in Mazandaran over time are due to other reasons for the lack of historical ports and shipping on this sea. The advancement and rebounding of the surface of the Caspian Sea may drowning many potential ports under water or buried under the sandy beaches that are nowadays far from the coast; on the other hand, these fluctuations are filled the canals and beaches. 

Abstract
The purpose of this research is preliminary studies and speculation on a shipwrecked ship off the coast of Talesh city in Gilan province related to the Qajar period. In this regard, field studies and sampling of various parts of the hull (wood, metals, water and soil inside and outside the hull) as well as microorganisms such as fungi and moss on the hull have been done. It is noteworthy that the samples were taken from both the open parts and the buried parts of the hull and the surrounding area. After that, the necessary analyzes were performed. The purpose of collecting and interpreting the data resulting from the analysis in this study is to provide a suitable solution for the protection, restoration and maintenance of this valuable historical monument to be considered at the national level and its location as a special tourist museum site. A region should be given priority and the heritage and cultural value of this work should be heard by foreign and domestic tourists. Therefore, the first step of this research has been field studies, speculations and necessary analyzes in the field of protection and restoration, which in the next stages should be considered by considering the appropriate conditions of maintenance and application of reconstruction processes with special protection instructions. And restoration, this ship should be formed in its original form and the lost parts should be restored. In this study, water samples inside and outside the ship were measured with a pH meter. After performing relevant analyzes, including spectroscopy of samples of wood textures of the hull, the presence of hydrocarbon compounds and petroleum derivatives (bitumen) has been determined from FTIR analysis. Other essential analyzes in this study are microbial tests taken from samples. Analyzing the results obtained from the cross section of the samples, this ship was Russian, which was used to transport petroleum products with a wooden structure made of Russian pine (coniferous leaf). In terms of antiquity and time, during the Qajar period and before that, for unknown reasons, it has blossomed on the shore of Ghorogh in the Talesh section of Gilan province.
Keywords: Russian Shipwreck, Qoroq Coastal, Talesh Region of Guilan Provence, Oil Derivatives, Russian Pine, FT-IR Analysis.

Introduction
The pinnacle of underwater archaeological advances is more related to the time when the Scuba: self-contained underwater breathing apparatus was invented. Figure 1 This discipline has revolutionized underwater, seas, and oceans and has yielded valuable achievements and discoveries (Dekker, David, 1889; Davis, 1955; Quick, 1970). Underwater archeology, especially the study of sunken and wrecked ships, is a field of archeology that has the most expertise in the study and exploration of sunken ships. Its techniques are a combination of archeological and diving techniques to become underwater archeology. Therefore, shipwrecks have sunk on some shores and can be discovered and studied as a valuable historical document (Mireskandari, 1379). Study and research with acquired information from historical shipwrecks with objects sunk on the shores or sunk in the seas and oceans themselves is the expressive language and image of the valuable history and civilizations of many centuries and in the processes and patterns of ancient trade, Transportation and migration bring rich information and also transfer culture, knowledge and civilization to future generations. In the past, human beings have been able to conquer the sea and oceans with the least facilities, and this has been a sign of the genius and continuous efforts of people in ancient times and times (Glisan, 1366; Mireskandari, 1379). Therefore, the study of the history of maritime trade and the structure of the historic ships of the Caspian Sea is a necessity that has not been seriously considered by researchers. In this study, the wood structure as well as the necessary analyzes for wood science and extraction materials as well as microbial tests and environmental factors on this ship were studied and with different technologies such as FT-IR and also with extraction processes with solvents. Organic on the internal samples of this shipwreck, useful results have been obtained, including the presence of petroleum derivatives in the internal parts of the hull. The processes of this research are used as basic studies in order to use the best scientific methods and principles in the next stages for its protection, restoration and implementation of technical maintenance operations.

Material and Method
For initial investigations, ambient humidity and ambient temperature were measured at several points with a data logger to analyze the effect of ambient humidity on damage to the ship’s structure and hull for additional studies. At first, with the necessary inspection and visit to the site, the damages that were visible in the structure and appearance of the work were identified, which include the following: 1- Change in the appearance and texture of the wood used; 2- Corrosion of the surface of the metal (mainly nails) iron ones) used for connections and fastenings; 3- Change in color, shape and texture of the covering and strengthening material of the used wood; 4- Burning of wooden surfaces on the southwest side due to lighting a fire on the side of the ship; 5- Fracture and the lack of parts of the ship’s skeleton in some parts of it; 6- Growth of microorganisms and moss cover on a part of the wooden surfaces that were exposed to stagnant moisture; 7- Accumulation of cement tissue around metal joints and fasteners and its homogenization with joints; 8- The inadequacy of the environmental conditions of the ship’s structure, including humidity and temperature in the parts buried in the sand and the outer parts of the ship; 9- The wear of the wooden surfaces of the outer body of the ship due to the movement of sand particles through the wind can be mentioned. For preliminary investigations, ambient humidity and ambient temperature were measured at several points with a data logger device in order to analyze the impact of ambient humidity on the damage caused to the structure and hull of the ship for further studies. By drying the wood specimen of the ship’s hull to prepare the microtome, the work steps were performed according to the working method and cross sections were prepared from the samples. Russia. Also, Microbial tests with moss and mold on wood and microorganisms have been performed in the microbial environment. The results obtained from the microbial tests of the Bio-microbiology Laboratory are as follows. Necessary analyzes have been performed on wooden samples of ship hull with FTIR to check the structure of wooden structures and effective materials.

Results and Discussion
The identified fungi are Aspergillus niger (Aspergillus niger), Aspergillus flavus and Aspergillus fumigatus (Aspergillus fumigatus) that is worth mentioning that due to the coverage of the entire surface of the plate by Aspergillus fungus, it is possible that some fungi in the environment that have a lower growth rate were not grown and isolated on the subrodextrose agar culture medium. The results of the identification of bacteria grown on nutrient agar medium are Bacillus, Pseudomonas, Flavobacterium, Staphylococcus and Arthrobacter.
Bacteria and fungi lead to the deterioration of wooden works through the production of cellulose and lignin decomposing enzymes in the structure of wood. In this study, all the fungal species identified belonged to the genus Aspergillus. This genus of fungi, which includes more than 300 different species, can be found on a large scale all over the world in different environments, including soil, and they multiply quickly in the right conditions, including access to humidity and the right temperature. The production of different enzymes, including cellulase, by different types of Aspergillus species has been proven, hence the isolation of this group of fungi on wooden works indicates their high potential in destroying organic compounds in wood. On the other hand, it should be noted that due to the high growth power of Aspergillus fungus that quickly covers the entire surface of the culture medium, it was not possible to identify and isolate other possible fungi in the environment.
All the bacterial genera isolated in this study are among the bacteria that are abundantly found in various surveys of environmental samples, including soil, therefore, the isolation of these bacterial genera in this study is not far from the mind. The production of extracellular cellulase enzyme has been proven by some of this group of bacteria, including Bacillus, Pseudomonas, and Flavobacterium. It is worth mentioning that the isolation of the relevant bacteria from wood is the reason for the production of 100% cellulose or lignin decomposing enzymes by them, but in an environment with a high microbial population, microbes can use the organic substances released in the environment by the enzymes extracellular produced by other microorganisms to use for growth and reproduction. In total, the culture results of the relevant samples indicate high bacterial and fungal contamination, which often have a high potential to produce enzymes and substances that damage the structure of wood. 

Conclusion
According to the results obtained from various analyzes, including FT-IR results from samples extracted from the hull of a historic ship in the Ghoroq area of Talesh city in Guilan province, due to its high antiquity and its historical and cultural value in the region in different dimensions Including tourism can be very important, so scientific studies for its protection and reconstruction are among the topics that are currently left on the beach without any protection operations and have been exposed to a variety of natural and unnatural damage. These studies are the source of a suitable solution for following the necessary protection and repair instructions. Therefore, in the beginning of these activities, recognizing the injuries and providing a solution is essential. Through field research and analysis of samples, the wooden structure of the hull was made of coniferous wood from Russia and its use has been active in the transportation of goods, including petroleum derivatives. With the analyzed samples of the in-ship jute texture in FT-IR spectroscopy, most of the parts show the wood texture, but some samples show the presence of hydrocarbon compounds that mainly constitute the structure of kerosene. Therefore, considering that the structure of the main timber of the ship’s hull, in addition to being saturated with water, is full of oil compounds, so it needs special protection and restoration operations to perform the best reconstruction and restoration on these valuable historical monuments. The commercial, economic and cultural history will chart a new path for future economic activities and also serve as a professional tourism center for domestic visitors and foreign tourists.

Acknowledgments 
The cooperation of Mr. Abdulmajid Naderi from the oceanographic research institute in the area of the Qoruq ship in Talash city of Gilan province in field studies and sampling is greatly appreciated. Appreciation is given to the respected Research Assistant of the Cultural Heritage Research Institute who always provide the necessary assistance in the direction of research. We would like to thank the dear experts of the Cultural Heritage Research Institute for the necessary assistance for the analyses. We sincerely thank Mrs. Sahar Nouhi for her help in FT-IR spectroscopy, Dr. Nasreen Nouhi Babajan for the microbial analysis of the samples, and Mrs. Irfan Menesh for her cooperation in the extraction process.
The Authors gratefully acknowledge the support of Research Institute of Cultural Heritage & Tourism, Tehran, Iran. It should also be noted that this program is with license 98102964 on 9/24/2018 with the financial support of the Ports and Maritime Organization and with the participation of the Research Institute of Oceanography and Atmospheric Sciences, by the Research Institute of Cultural Heritage and Tourism of the country