Steering Systems: Hydraulic steering mechanisms in ships allow for precise control of the rudder, enabling maneuverability and navigation. These systems provide the necessary force to move large rudders effectively.

Anchor Handling: Hydraulic systems are used to operate anchor winches and chain windlasses. These systems help in the deployment and retrieval of anchors, essential for mooring and station-keeping.

Deck Machinery: Hydraulic power is used in various deck equipment such as cranes, winches, and capstans. These systems handle cargo loading and unloading, line handling, and other critical deck operations.

Hydraulic Stabilizers: Ships and offshore platforms use hydraulic stabilizers to reduce the impact of waves and improve stability. These systems adjust the position of stabilizer fins or gyroscopic devices to counteract roll and pitch.

Control Systems for Bow Thrusters: Hydraulic systems control bow thrusters, which are used to improve a vessel's maneuverability, especially during docking and low-speed operations.

Marine Propulsion: Some vessels use hydraulic systems for controlling the pitch of variable-pitch propellers or for operating other propulsion-related mechanisms.

Lift Systems: Hydraulic lifts and elevators are used in various marine applications, including accessing different levels of the vessel and handling equipment.

Fishing Gear: In commercial fishing, hydraulic systems are used to operate trawl winches, net haulers, and other gear, facilitating efficient catch handling and processing.

Submersible Equipment: Submersibles and remotely operated vehicles (ROVs) use hydraulic systems for functions such as manipulating tools, controlling depth, and maneuvering underwater.

Hydraulic Power Packs: These are used to provide hydraulic power to various systems and equipment on board, especially when centralized power is required for multiple hydraulic functions.

Ballast and Trim Systems: Hydraulic systems manage ballast tanks and trim systems to adjust the vessel’s weight distribution and maintain stability.

Emergency Systems: Hydraulic systems are often included in emergency equipment, such as lifeboat release systems and emergency hatch controls.