Ships need solid structures reaching into deeper water. A pier is a raised platform supported on piles or pillars and extending from the shore into the water, used for berthing ships and transferring cargo or passengers.

Piers differ from quays, which usually run parallel to the shore. Finger piers allow ships to berth on both sides. Strength, length, and depth alongside determine the size of vessel that can use the pier. Cranes, pipelines, and passenger gangways are common fittings.

Piers are exposed to weather and ship impact; fendering and regular inspection prolong their life. In some trades the pier is the entire terminal. Safe access between ship and pier is a basic operational requirement in all conditions.

• Raised platform extending into the water for berthing
• Supported on piles or similar structures
• May allow berthing on one or both sides
• Equipped for cargo or passenger transfer