Parts of a Boat and a Ship

A motorboat from the side and from above, then a cargo ship, with every part numbered.

Tap any part to read, rename or leave it out

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Each numbered ring is a button. Use the arrow keys to move between them and Enter to choose. Names are read out in Study, and once a part is answered.

All 24 parts on the diagram

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Start here: 10 main parts 10

  1. Bow The front of the boat.
  2. Stern The rear of the boat.
  3. Port The left side when you face the bow; its light is red.
  4. Starboard The right side when you face the bow; its light is green.
  5. Hull The body of the boat, the part that floats.
  6. Gunwale (gunnel) The upper edge of the side, said "gunnel".
  7. Keel The main centreline along the bottom, the boat's backbone.
  8. Transom The flat surface across the stern, where outboards mount.
  9. Cleat A metal fitting that a rope is made fast to.
  10. Propeller Spins to drive the boat forward or backward.

Boat from the side 5

  1. Waterline The line where the hull meets the water's surface.
  2. Rudder A vertical blade at the stern that steers the boat.
  3. Length overall (LOA) The hull's length from bow tip to stern, fittings left out.
  4. Freeboard Height from the water to where it could first come aboard.
  5. Draft (draught) The depth of water the boat needs to float.

Boat from above 1

  1. Beam The width of the boat at its widest point.

Cargo ship 8

  1. Bulbous bow A bulb below the waterline that cuts drag.
  2. Anchor Holds the ship in place on its chain.
  3. Forecastle (fo'c'sle) A raised deck at the bow, said "folk-sul".
  4. Hatch cover Closes a hatch, the deck opening cargo goes through.
  5. Hold The cargo space inside the hull.
  6. Superstructure Everything built up above the main deck.
  7. Bridge The command centre, where the ship is steered from.
  8. Funnel The smokestack that carries engine exhaust up and away.

How this list was compiled: Read 2026-09-26. (1) A state boater safety course (Tennessee, produced by Kalkomey Enterprises): Parts of a Boat From a Side View, https://www.boat-ed.com/tennessee/studyGuide/Parts-of-a-Boat-From-a-Side-View/10104402_47543/ (bow, cleat, gunwale, hull, port, propeller, starboard, stern); Parts of a Boat From a Front View, https://www.boat-ed.com/tennessee/studyGuide/Parts-of-a-Boat-From-a-Front-View/10104402_47544/ (beam, draft, freeboard, keel); Measuring Length Overall, https://www.boat-ed.com/tennessee/studyGuide/Measuring-Length-Overall/10104402_47552/ (length overall, rudder); Inboard Engines, https://www.boat-ed.com/tennessee/studyGuide/Inboard-Engines/10104402_47556/ (transom; rudder behind the propeller). (2) Wikipedia, Glossary of nautical terms, https://en.wikipedia.org/wiki/Glossary_of_nautical_terms_(A%E2%80%93L) and https://en.wikipedia.org/wiki/Glossary_of_nautical_terms_(M%E2%80%93Z) : every boat term above plus waterline; and for the ship: bulbous bow, anchor, forecastle, hatch and hatchway, hold, superstructure, bridge, funnel (also stack). Licence: own work

The drawing: Drawn for this site by script, 2026-09-26. Licence: own work

How it works

Bow is the front, stern the back, port the left and starboard the right when you face the bow. This parts of a boat diagram numbers 16 parts of a motorboat and 8 parts of a cargo ship.

Read the full guide

Basic parts of a boat

Boating courses teach bow, stern, port, starboard and hull first. The gunwale, said gunnel, is the top edge of the side, the keel runs along the bottom, and the transom is the flat back.

Three measurements

Freeboard runs from the water up to where water could first come aboard, draft from the water down to the lowest point. Beam is the width at the widest point.

Main parts of a ship

Cargo goes through hatches into the holds. The bridge, where the ship is steered, sits on top of the superstructure, and the funnel carries the exhaust away.

Questions and answers

What are the parts of a ship called?

The front is the bow and the back the stern; the body is the hull, with the keel along its bottom. On deck a cargo ship has hatch covers over its holds, a superstructure with the bridge on top, and a funnel.

How do you remember port and starboard?

Port and left both have four letters. Facing the bow, port is on your left and starboard on your right, whichever way you are standing on deck. At night the port light is red and the starboard light green.

What are the parts of a ship deck?

On this cargo ship, the forecastle is the raised deck at the bow, hatch covers close the openings down to the holds, and the superstructure stands on the deck near the stern, with the bridge and the funnel.

Why do ships have a bulbous bow?

The bulb sits at the bow just below the waterline and changes the way water flows around the hull. That reduces drag, which adds speed, range, stability and fuel efficiency.