The objective of any River Information Services system is the safe, efficient and environment friendly transport of men, materials and machinery in inland waterways, including canals, lakes and backwaters. Transport should be safe with minimum injuries, fatalities and accidents. It should efficiently maximise throughput and effective capacity of waterways and carrying capacity of vessels, reduce travel time and costs and should efficiently link between transport modes and terminals. Environment hazards like polluting emissions and oil spills due to illegal actions or normal operations should be avoided. The RIS can be categorised into various information levels like fairway information, tactical and strategic traffic information, traffic and transport logistics management information, statistical information, calamity abatement information, tariff information and information for law enforcement. The various services and their functions are interlinked with multiple users and various levels of operation. Because of this, information flow is multilevel for multiple users. In RIS systems, the RIS personnel evaluate the various data and make decisions based on personal experiences and similar business situations and then disseminate information to multiple users. Human errors in such a situation can lead to accidents with catastrophic effects like loss of business, loss of vessels and even loss of lives. In such situations computerised information processing systems can play a significant role in improving safety and

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Abstract-Corrosion represents one of the largest through life cost component of ships. Ship owners and operators recognize that combating corrosion significantly impacts the vessels' reliability, availability and through life costs. Primary objective of this paper is to review various inspections, monitoring systems and life cycle management with respect to corrosion control of ships and to develop the concept of "Corrosion Health" (CH) which would quantify the extent of corrosion at any point of ships' operational life. A system approach in which the ship structure is considered as a corrosion system and divided into several corrosion zones, with distinct characteristics, is presented. Various corrosion assessment criteria for assessment of corrosion condition are listed. A CH rating system for representation of complex corrosion condition with a numeric number along with recommendations for repair/maintenance action is also discussed.Index Terms-Corrosion control of ships, corrosion health, corrosion of ship structure, marine corrosion, monitoring systems, ship inspections.

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