Parts of a sailing boat
A sailing boat has a hull, steering gear, rigging and sails; port is left and starboard right when you face the bow.
Reviewed by Ramon Curto, Nautical teacher at IECNPC · Last reviewed:
1 · Bow
The forward end of the boat.
Worked example
Deck height: 1.8 m · Waterline height: 1.2 m
Freeboard: 1.8 m − 1.2 m = 0.6 m
The vertical distance from the waterline to the deck edge here.
How it works
Read the yacht from front to back. The bow is forward and the stern aft; the transom is the surface across the stern on this particular boat. Port and starboard stay fixed to the vessel. When you turn round to face aft, port is still the boat’s port side even though it is now on your right. This fixed vocabulary lets a crew give instructions without guessing which way the listener is looking.
Use the side view to locate the rig and underwater steering surfaces, then switch to the deck view for sides, width and working areas. The numbered markers match the term buttons below. Select a term to read its function, or use flashcards to recall the definition before revealing it. The drawing is schematic: fittings differ between boats, and a centreboard dinghy does not have this yacht’s fixed ballasted keel.
Keep the sail-control lines separate in your mind. A halyard hoists a sail; a sheet adjusts its angle. Neither word means every rope on board. Stays and shrouds support the mast, while a winch helps you haul a loaded line and a cleat holds it. The boom can sweep across the cockpit in a gybe, so knowing its name and position is also a safety skill. Lifelines reduce the chance of falling overboard but do not replace safe movement or a suitable tether.
For the worked example, take a deck edge 1.8 m above a common reference and a waterline 1.2 m above that same reference. The vertical difference is 0.6 m: that is the freeboard at the chosen point in this simplified sketch. It is not the draught, which measures down to the lowest immersed part, and it is not beam, which measures width. Loading changes the waterline and freeboard. These teaching dimensions are invented for the example, not specifications of a real yacht or a statutory measurement.
Boat vocabulary is a foundation for RYA practical sailing instruction. Spanish PER theory also tests nautical nomenclature; French coastal-licence preparation uses basic vessel and steering vocabulary, but is not a sailing qualification. Learn the term together with its job, then identify it on the actual vessel with your instructor. The reference definitions below explain all thirty markers.
- 1 · Bow
- The forward end of the boat.
- 2 · Stern
- The aft end of the boat.
- 3 · Port
- The left side when you face forward, regardless of where you stand.
- 4 · Starboard
- The right side when you face forward.
- 5 · Hull
- The main body that floats and supports the boat.
- 6 · Keel
- The underwater fin that resists sideways movement; a ballasted keel also aids stability.
- 7 · Rudder
- The movable underwater surface that steers the boat.
- 8 · Tiller / wheel
- The steering control connected to the rudder; the tiller moves opposite the turn.
- 9 · Mast
- The upright spar that supports the sails and rigging.
- 10 · Boom
- The spar along the foot of the mainsail; keep clear as it swings.
- 11 · Forestay
- The stay supporting the mast from the bow.
- 12 · Backstay
- The stay supporting the mast from aft.
- 13 · Shrouds
- The lateral rigging supporting the mast on either side.
- 14 · Mainsail
- The principal sail set behind the mast, above the boom.
- 15 · Jib / genoa
- A headsail forward of the mast; a genoa overlaps the mast.
- 16 · Halyard
- The line used to hoist a sail.
- 17 · Sheet
- The line that controls a sail’s angle to the wind.
- 18 · Winch
- A rotating drum that gives mechanical advantage when hauling a line.
- 19 · Cleat
- A fitting on which you secure a line.
- 20 · Fairlead
- A fitting that guides a line and limits chafe.
- 21 · Stanchion
- An upright post supporting the lifelines along the deck edge.
- 22 · Guardrail / lifeline
- The protective wire or rope supported by stanchions along the deck.
- 23 · Pulpit
- The protective rail around the bow.
- 24 · Pushpit
- The protective rail around the stern.
- 25 · Cockpit
- The recessed working area where the crew usually steers and handles sails.
- 26 · Companionway
- The entrance and steps leading from deck to the cabin.
- 27 · Transom
- The transverse surface closing the stern of this yacht.
- 28 · Waterline
- The line where the hull meets the water at a given loading.
- 29 · Freeboard
- The vertical distance from the waterline to the deck edge here.
- 30 · Beam
- The boat’s width across the hull.
Questions
Which side is port?
The left side when you face forward, regardless of where you stand.
How are a halyard and sheet different?
The line used to hoist a sail. The line that controls a sail’s angle to the wind.
What does the keel do?
The underwater fin that resists sideways movement; a ballasted keel also aids stability.
Is a tiller the rudder?
The steering control connected to the rudder; the tiller moves opposite the turn. The movable underwater surface that steers the boat.
How do you measure freeboard?
For the worked example, take a deck edge 1.8 m above a common reference and a waterline 1.2 m above that same reference. The vertical difference is 0.6 m: that is the freeboard at the chosen point in this simplified sketch. It is not the draught, which measures down to the lowest immersed part, and it is not beam, which measures width. Loading changes the waterline and freeboard. These teaching dimensions are invented for the example, not specifications of a real yacht or a statutory measurement.
Are all yachts laid out like this?
Use the side view to locate the rig and underwater steering surfaces, then switch to the deck view for sides, width and working areas. The numbered markers match the term buttons below. Select a term to read its function, or use flashcards to recall the definition before revealing it. The drawing is schematic: fittings differ between boats, and a centreboard dinghy does not have this yacht’s fixed ballasted keel. Boat vocabulary is a foundation for RYA practical sailing instruction. Spanish PER theory also tests nautical nomenclature; French coastal-licence preparation uses basic vessel and steering vocabulary, but is not a sailing qualification. Learn the term together with its job, then identify it on the actual vessel with your instructor. The reference definitions below explain all thirty markers.