Book excerpt: Contemporary time has seen alarming environmental revolt that is calls for attention and concern about the biosphere world, a condition that calls for need to use advantage of human improved knowledge and civilization in science engineering to develop proactive, efficient and predictive based system that meet reliability and sustainability requirement as well to reduce uncertainty components of system design. Proactive based philosophy under safety and environmental framework should be exercise on all level of system life cycle, including design, construction, operation and disposal. Selection of all element of the life cycle should be responsibly done and pollution impact of the system to the environment and community should be mitigated. The book present application of risk and reliability analysis to various cases of marine system and subsystem, application of risk method ranging from qualitative, quantitative to simulation and analytical approach is presented.