What Is International Shore Connection?

What Is International Shore Connection - Merchant Navy Info

Safety At Sea

The international shore connection is a universal hose connection. That must be present on all ships according to IMO SOLAS requirements. The purpose of the international shore coupling is to keep a hose attachment on standby to provide a connection. From shore or another ship for onboard firefighting in case of total failure of the onboard pumps. When an international shore coupling is used. Seawater is supplied at a given pressure and also connected to the ship’s main fire line. This international shore connection flange is normally kept in an easily accessible. Place on the ship (bridge or fire room) so that it is readily available and usable in case of an emergency. 

Exploring the Requirements for International Shore Connections

The SOLAS requirements for international shore connections, according to Chapter II-2, Regulation 10217, state that At least one international shore connection is required for ships of more than 500 gross tonnages. Shore Connection Flanges are standardized sizes and are the same for all countries and ships to ensure that firefighting assistance is always available from any port in case of a ship emergency outside the home port.

International Shore Connector

International Shore Coupling dimensions are Description Dimensions Outside Diameter (OD) 178 mm Inside Diameter (ID) 64 mm Hole Circle Diameter (PCD ) 132 mm Slots in Flange Four holes of 19 mm diameter are evenly spaced on a hole circle of the above diameter and are slotted to the circumference of the flange. Flange thickness At least 145 mm Bolts and nuts Four of 16 mm in diameter and 50 mm long. Basic requirements for international shore connections. Where an emergency fire water source is provided, at least one international ground fire connection is required or must be provided. The connection must be made of steel or other suitable material and rated at 10 N/mm2. One side of the flange must have a flat face, and the other side must be attached to a coupling that is either permanently connected or easily fitted to the ship’s fire hydrant and hose connections.

ISC International Shore Coupling

The connection shall be held on board with a gasket made of a material capable of withstanding a pressure of 10 N/mm2, four 16 mm screws, 50 mm long, and eight washers to ensure the connection is made and ready for immediate use in case of emergency. Where an ISC is fitted to the ship’s fire main, the shore connection shall be accessible from both sides of the ship and clearly marked. 

A notice written in English and the local language of the ship’s flag shall be posted near the ship’s fire pipe near the accommodation, indicating the connection location and maximum working pressure of the piping system, which the port shall recognize and provide. In the fire water distribution network, the velocity of water conveyed from the port or a another ship to the affected ship is shall not exceed five m/s. Fittings and connections must be suitable for an operating pressure of at least 105 bar.

Important Notes Regarding The ISC

The international shore connection flange is should be included in the vessel’s Preventive Maintenance (PM) Plan, not the vessel’s Condition Monitoring (CM) Plan. Ensure that gaskets are always available for the international shore connection flange. There is always a risk of the gasket being damaged when working in an emergency, so it is recommended that multiple gaskets be prepared and kept in the ISC. When developing a task list for fire drills, assign a person to bring the international shore connection to the open deck area where the shore connection will be made. Habits maintained during practice will inevitably shorten response times in an actual emergency.

Why is the ISC Vital? 

Fire Security: 

The essential work of the ISC is to supply an outside water source for firefighting. In case of a fire onboard, the ship’s fundamental fire framework could be overpowered or harmed. The ISC permits firefighters to associate a shore water supply to the dispatch, also upgrading firefighting capabilities. 

Administrative Compliance: 

The SOLAS Tradition orders that all ships must be prepared with an ISC. This requirement is input to guarantee a standardized strategy of water supply, making it less demanding for shore-based firefighting groups to help vessels in trouble. 


The ISC takes after standardized measurements and details, guaranteeing compatibility between different shore-based frameworks and ships from distinctive nations. This all-inclusiveness is significant in universal ports where ships from differing roots dock. 

Determinations of the ISC 

The ISC must follow particular measurements and necessities as sketched out in SOLAS directions: 


The spine ought to have a standard estimate, ordinarily 178mm in distance across with a jolt circle of 132mm. 

Jolts And Nuts: 

The ISC employs four jolts and nuts, each with a distance across of 16mm and a length of 50mm. 


A non-asbestos gasket, 3mm thick, is utilized to guarantee a watertight seal. 


The ISC is ordinarily made from corrosion-resistant materials like bronze or stainless steel to resist unforgiving marine situations. 

When is the ISC Utilized? 

Crisis Circumstances: 

Amid onboard fires, particularly in the event that the ship’s fire fundamental framework is compromised. The ISC gives an alternative water source to combat fires viably. 

Upkeep And Drills: 

The ISC is regularly utilized amid fire drills and upkeep to guarantee the system’s usefulness. Customary checks and drills including the ISC plan the team for genuine crisis scenarios. 

Harbour State Control Assessments: 

Amid assessments, harbour specialists may check the ISC to guarantee compliance with universal directions. Having a useful and compliant ISC is basic to maintain a strategic distance from punishments and guarantee the ship’s security status. 

How to Utilize the ISC 


Find the ISC on the vessel. It is regularly put away in an assigned region that’s effortlessly accessible. 


Join the ISC to the ship’s fundamental fire framework. Guarantee that the flange, bolts, and also gasket are accurately adjusted and safely fastened. 

Shore Association: 

Interface the shore-side hose to the ISC. Guarantee that the shore-side water supply is congruous with the ISC determinations. 


Once associated, the shore-side water supply can be actuated, also giving an unfaltering stream of water to the ship’s fire main system. 


The Worldwide Shore Association is an irreplaceable portion of sea security, guaranteeing that ships have access to outside water supplies amid crises. By standardizing the association interface, SOLAS controls encourage proficient and also successful firefighting bolster from shore-based groups. Standard support, drills, and assessments, including the ISC, are fundamental to guarantee its capacities accurately when required, also defending lives and property at the ocean. 

 For advance perusing, oceanic experts ought to counsel the most recent SOLAS rules and also their vessel’s security administration frameworks to guarantee full compliance and also operational status. 

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