• 14 parts
  • Checked September 2026

Parts of a Marina

A small-craft marina from above: the breakwater, two docks of slips, a mooring field and the services ashore.

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All 14 parts on the diagram

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Start here: 8 main parts 8

  1. Slip (berth) One boat’s parking space, between two finger piers.
  2. Breakwater Stops the waves so the water inside stays calm.
  3. Main pier (main dock) The spine of a dock, carrying people, power and water.
  4. Finger pier Runs off the main pier along the side of a slip.
  5. Fuel dock Where boats tie up to buy fuel.
  6. Boat ramp (launch ramp) Trailered boats are backed down it into the water.
  7. Mooring field Boats tie to buoys here instead of a dock.
  8. Fairway The water lane boats use to reach their slips.

On the water 2

  1. Entrance channel The way in from open water, marked with buoys.
  2. Piling (pile) Posts driven into the bottom that hold the docks in place.

Services and the shore 4

  1. Transient dock (courtesy dock) Short-stay mooring for visiting boats.
  2. Pump-out station Empties boats’ sewage holding tanks.
  3. Travel lift Lifts boats out in slings and drives them ashore.
  4. Dry stack storage Boats are kept on racks indoors, out of the water.

How this list was compiled: Read 2026-09-24. (1) Wikipedia, Marina, https://en.wikipedia.org/wiki/Marina : boats moored on buoys or on walkways tied to pilings; slipways or boat ramps for trailered boats; a travel lift for lifting heavier boats out; fuel. (2) A national park service's Marina Standards, https://www.nps.gov/subjects/concessions/upload/Marina_Standards.pdf : breakwaters; slips; gangways; launch ramps; courtesy and transient docks; fuel docks; pump-out; hoists and travel lifts; mooring buoy fields. (3) A state clean marina guidebook, https://dnr.illinois.gov/content/dam/soi/en/web/dnr/cmp/documents/projects/guidebook.pdf : breakwaters; entrance channels; primary piers with fingers; slips; pilings; transient docks and slips; fuel docks; pump-out stations; boat ramps; travel lift; dry storage; wave attenuators. (4) A civil engineering paper on modern marina layout and design, https://www.bscesjournal.org/wp-content/uploads/2021/05/CEP-Vol-7-No-1-05.pdf : slips, slip fingers, fairways, dry stack and dry storage. (5) A marina software maker's guide, Parts of a marina, https://marinaplan.com/blog/parts-of-a-marina-a-complete-operator-s-guide : harbor basin and breakwater; entrance channel; fairways at least 1.5 boat lengths wide for perpendicular berths; main docks (marginal piers, headwalks) and finger piers supporting at least two thirds of the boat; slips; pilings; fuel dock and pump-out station; dry stack storage. Licence: own work

The drawing: Drawn for this site by script, 2026-09-24. Licence: own work

How it works

A marina is a sheltered basin where boats are kept. A breakwater calms the water, and boats come in by the entrance channel and fairways. Main piers with finger piers make slips; services line the shore.

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On the water

Each dock is a main pier from the shore with finger piers either side; the space between two fingers is a slip. Pilings hold the docks in place. Boats reach their slips along the fairway, and some tie to buoys in the mooring field.

Services

Visiting boats stop at the transient dock. The fuel dock sells fuel, and its pump-out station empties holding tanks. Ashore, trailered boats use the boat ramp, a travel lift hauls bigger ones out, and dry stack storage keeps boats on racks indoors.

Questions and answers

What are the parts of a marina called?

The breakwater, entrance channel and fairways; main piers with finger piers making slips; pilings; a mooring field; and services: a fuel dock with a pump-out station, a transient dock, a boat ramp, a travel lift and dry stack storage.

What is the difference between a slip and a finger pier?

A finger pier is the narrow walkway; the slip is the water space beside it where one boat is kept. Fingers run off the main pier, one on each side of a slip or shared between two.

What is a fairway in a marina?

The open water lane between rows of docks that boats use to reach their slips. It is kept wider than the longest boats beside it, at least one and a half boat lengths, so they can turn in.