This research was conducted over three days using a test instrument to determine whether there is a relationship and effective contribution of togok flexibility and the ability of leg muscle towards Power Jump headings. This study used correlation method.The results shows that flexibility of togok (Km = 0.02), limb muscle power (Km=0.09), Jump heading ability (Km = 0.12). Besides, Fcounted = -0.89 ≤ F table = 3.56. The correlation between X1-Y: 0.90 = 90%, X2-Y: 0.98 = 98%, and the contribution result was = 86% (α=0.05). Thus, the Ha is accepted. In other words, there is significant relationship between togok flexibility and limb muscle power with the ability to jump of male student who took football extracurricular at SMK 2 Muara Enim.

Maintenance, Repair, and Overhaul is an action to control, know and ensure the life of a defense equipment. Indonesia should have a concept for maintenance, repair and overhaul in the defense industry. The problem in this research is how to determine priority weighting and development strategy plan for Maintenance, Repair and Overhaul warships implemented by Fasharkan Surabaya to support the readiness of marine operations. The purpose of this study is making a strategic plan for the development of Maintenance, Repair and Overhaul warships carried out by Fasharkan Surabaya in support of marine operations readiness. The method used in this study is the determination of criteria by hierarchy using the Analytical Hierarchy Process (AHP). The results of the study show that Strategic priorities using the AHP concept obtained 5 strategies, namely 1) Cooperation in Higher Education related to technology with the highest weight, 0.42. 2) Improving the quality of Human Resources with a weight of 0.23. 3) Improve Education and Training with a weight of 0.18. 4) Fulfillment of Human Resources according to the List of Personnel Arrangement with a weight of 0.11. 5) Cooperation with the defense industry with a weight of 0.06.Keywords: Maintenance, Repair and Overhaul, Warships, AHP, Marine Operation Readiness.

The Indonesian Navy is the spearhead in maintaining maritime security in Indonesian waters. In carrying out its main tasks, the Indonesian Navy has components of an Integrated Fleet Weapon System in which there are elements of Ships and Naval Bases. To ensure the effectiveness of carrying out operations by ship elements, ship operations are supported by the Naval Base as the organizer of the support function. Naval Base's carrying capacity consists of 5 (five) support functions, including: (1) support for anchoring facilities; (2) support for supply facilities; (3) support for maintenance and repair facilities; (4) support facility maintenance personnel; and (5) support for base development facilities. Naval Base does not yet have its dock to support anchoring facilities for ship operations. In addition to cooperation in the use of the Naval Base anchorage facility, there is also cooperation in port security, both in terms of land and port water aspects. As the number of ship visits at Naval Base Harbor increases, the dock utility increases. The increase in dock utility resulted in a decrease in port services which also resulted in a decrease in the Naval Base Carrying Capacity. To improve port services, Pelindo III implements the port development program contained in the Naval Base Port Master Plan in Permen KP number 792 of 2017. In this study, an analysis of the impact of the Naval Base Port development policy on the carrying capacity of the Naval Base was carried out. The data analysis uses System Dynamics modeling with a simulation period of 30 years in 3 development scenarios, namely short-term scenarios, medium-term scenarios, and long-term scenarios. From the simulation results, it is found that the construction of the Naval Base port affects the Naval Base Carrying Capacity with an average increase of 1.8% in each policy scenario. The increase in Naval Base Carrying Capacity has an effect on increasing Ship Operations by an average of 1.8% and also increasing the Security of Naval Base Harbor by an average of 0.14%. The results of the analysis of this study can be used as consideration for policymaking by the Navy.

The Sea Mines are explosive devices placed in the waters to destroy ships or submarines. The sea mines were placed in the water depths and waited until it was triggered to be blown up by an approaching enemy vessel. The waves in the leave can be measured using the air pressure sensor placed below the water surface, the change in the sensor up and down will result in changes in air pressure. Changes in the resulting pressure of the vessel will result in water waves, resulting from changes in the water wave height will result in a change in water pressure gauge sensors in the air. The MPX5700 air pressure Sensor, as a source of pressure measurement with analog voltage output is comparable to the large value of air pressure. Design the air pressure measuring instrument system using the Arduino microcontroller as the unit of the voltage conversion process to the pressure variable in the KPA. On testing authors use applications that are created using Visual Studio 2012 to plotting the pressure graphs and large voltage output sensors. Results obtained using the MPX5700 sensor with an analog output can result in a linear pressure output with a large voltage output, from the test result obtained the conversion value 0.2 V as the value of 0 Kpa and the value of 4.7 V asthe maximum value pressure measurement of 700 Kpa. Keywords: mines, MPX5700, Arduino microcontrollers

Low safety factor in the Standard Operating Procedure (SOP) in handling grenades that fail to explode at the training location can be fatal for personnel and instructors. In a previous study, a stick manipulator was designed. However, this tool has disadvantages because the operator is too close to explosives. By considering the security of personnel, the authors make "Design Robot Manipulator Build on Unmanned Grenade Tamer (UGT)". This tool is used to assist trainers and instructors in the implementation of laying explosives as a procedure for handling grenades that do not explode properly in position. The mechanism of this tool is made to complement the base tank that is driven by a robot remote control system that moves using a servo motor as an actuator. The total length of the horizontal arm stretch is 780 mm and 795 mm for the vertical stretch. Arm foundation is designed capable of rotating as far as 120⁰. Link 1 moves 150 °, link 2 150 °, Link 3 1801, and wrist roll 90 °. The force acting on link 1 is 16.758N in the direction of the y-axis parallel force, torque is 5.5 Nm and with an angular acceleration of 142rad / s². On the link 2 force of 16.66N, the direction of the force is parallel to the y axis, torque of 9.4 Nm and angular acceleration of 496rad / s². And on the 3 link force of 14.7N of torque of 3.3 Nm and angular acceleration of 293rad / s². The gripper gripping force is 1,158 kgf which is driven by a servo motor with a minimum torque of 5.42 Nm.   Keywords: Robot arm, Torque, Gripper