DECISION SELECTION MODEL OF LANDING BEACH IN AMPHIBIOUS OPERATIONS EXCERCISE WITH FUZZY MCDM Agus Setiadji 1 , Benny Sukandari 2 , Joni Widjayanto 3 , Rifki Najib 4 1, 4 Indonesian Naval Technology College, STTAL, Surabaya, Indonesia 2 Indonesia Naval Staff and Command College, Seskoal Jakarta Indonesia 3 Indonesia Defense University, Unhan, Jakarta Indonesia ABSTRACT To determine the ideal landing beaches in amphibious operations must meet the requirements / criteria that have been determined, because it serves as an important component in the choice of landing beaches. The criteria include the type of beach, gradient beach, the basic material of beach, long beach landings, the type of breaking waves, tide, the kind of obstacles beach, ocean currents, the field behind the beach, the reference point mark landing beaches and access to the exit / entrance beach , In determining the selection of the landing beaches Marine / Navy had not done the calculation / mathematical model and not using a scientific method, such instances it is necessary to make a decision-making model in the case of election of the landing beaches in amphibious operations exercise. This study aims to determine the location of the landing beaches using Fuzzy MCDM. The use of this method is the solution to produce a more objective group decision in the selection of an amphibious landing beach which data are accurate and reliable to help solve problems that are multi-criteria. There are 11 (eleven) criteria and 4 (four) alternatives identified in this study. Of the 11 criteria which have the highest weighting criteria for the alternative chosen in the first rank third alternative, namely PPD 3. Keywords: Amphibious Operations, Fuzzy MCDM, Criteria and Alternatives. I. INTRODUCTION Indonesia is the largest archipelago in the world with a very wide maritime region with a total coastline of about 81,000 and has more than 17,000 islands and sea area of 5.8 or about 70% of the total area of Indonesia (Son et al. 2017)it is considered reasonable and necessary in particular to safeguard and maintain the sea space through the development and strengthening of the navy for the defense and security of the sea or the territorial waters of various Threats Challenges Obstacles and Interference (ATHG) and war crimes or Military Operations War (OMP) and crimes other than war or Military Operations Other Than war (MOOTW) (Law on the TNI, 2004). It mainly beach aspect as the entrance of the enemy or friend is very important as a means / media entrance military forces to invade / landing forces occupied the region alone an enemy or enemy territory in particular. Not possible enemy forces will come suddenly through the land / land while our country is surrounded by sea. In the Indonesian Defense White Paper 2015 contains some of the content on strategic environmental development, the essence of the country's defense, policies, strategies and capacity building of national defense, the defense industry, international cooperation in the field of defense, civil defense, defense posture state, the defense of the country and the last on a budget National Defense. Asia-Pacific region is a strategic area, both in terms of economic, political, and military (Defense White Paper of Indonesia, 2015). In the perspective of the traditional security of this region has opportunities and challenges are very complex, as well as the risk factors that can lead to conflicts between states. International Journal of ASRO Volume 11, Number 02, pp. 22-34 Apr 2020