Gangway

What Sets a Gangway Apart

Three pieces of access equipment get confused on a ship, and they are not interchangeable. The pilot ladder is a rope ladder for transferring a pilot between a moving vessel and a pilot boat at sea. The accommodation ladder hangs from the ship's side at a working angle and adjusts for freeboard and tide. The gangway is the one that runs from quay to ship close to horizontal, resting on or reaching to the pier, and it telescopes in length rather than changing angle to cope with a rising or falling tide during a long alongside stay. Offshore work adds a fourth category: motion-compensated telescopic gangways that connect a support vessel to a fixed platform or wind turbine while both structures move independently, using active heave compensation to keep the walkway stable enough to cross safely.

Main Components

Telescopic Trackway

Nested sections extend and retract on rollers or a rack-and-pinion drive, letting the same unit span a range of distances as the vessel rises and falls against the quay.

Handrails and Safety Net

A rigid or wire handrail runs the full length, and a net slung beneath the walkway catches anyone who slips past the rail, a requirement port state control checks closely.

Winch and Luffing Gear

A winch raises, lowers and angles the gangway from the ship, with a mechanical or hydraulic brake holding position once set.

Turntable and Base

The base rotates to line the gangway up with the quay regardless of how the ship lies alongside, and takes the full static and dynamic load transferred from the walkway.

Motion Compensation (Offshore)

On offshore access systems, a gyro-stabilised or hydraulically actuated head, sometimes with a gripper that locks onto the platform structure, cancels out relative heave and roll so the walking surface stays effectively still.

Selection and Sizing

The extension range has to cover the actual distance and freeboard change expected at the berths the ship uses, with margin for spring tides. Safe working load must account for people and any wheeled equipment crossing together, not a single person alone. For offshore gangways the governing figure is the sea state the system can operate in, expressed as significant wave height, plus the stroke and reach of the compensation system relative to the vessel's typical motion at the transfer point.

Regulations and Class

Means of access safety for crew and shore personnel is addressed through the Maritime Labour Convention and ILO instruments on safe access, and class societies apply rules covering safety net fitting, non-slip surface, illumination and load testing. Because a gangway winch is a load-bearing lifting arrangement, it is typically subject to periodic proof load testing and thorough examination on an interval similar to other lifting appliances, not just a visual check.

Typical Faults

• Corroded or frayed winch wire - loses strength unevenly, risking uncontrolled lowering under load.
• Worn turntable bearings - the base binds or misaligns, so the gangway cannot be squared to the quay without forcing it.
• Missing or damaged safety net - a routine port state control deficiency, and a genuine fall hazard, not a paperwork item.
• Seized telescopic sections - corrosion or dried-out lubrication stops the trackway extending, forcing crew to rig the gangway at an unsafe angle instead.
• Compensation sensor drift on offshore units - loses accurate reference to platform motion, aborting transfers or degrading ride quality even though the hardware itself is intact.

What to Look For in a Supplier

• Current proof load test certification, not just a manufacturer's design rating.
• An extension range and angle capability that actually matches the vessel's typical berths, not just the theoretical maximum on a spec sheet.
• For offshore systems, a documented operating track record at the sea states the vessel actually encounters, not a lab-tested figure alone.
• Spares availability for winch and hydraulic components in the vessel's trading area.
• Compatibility with the existing stowage and davit arrangement if only the gangway itself is being replaced.

Inspect the winch wire and net before every use, not only at the annual survey - a gangway sits rigged for days at a time exposed to weather, and that is exactly when small damage turns into a failure.