- rountne inspection
- rowlock
- rubbing strake
- rudder brace
- rudder pedal
- rulling grade
- saloon
- saloon carriage
- saloon coach
- saloon deck
- salty border
- salvage
- salvage money
- salvage vessel
- same size
- run down
- run into
- runaway
- running
- running fix
- running rail
- running surface
- runway number
- safety harness
- safety pin
- sail
- sail area
- sail locker
- sail-maker
- sailing dinghy
- samson post
- sandow
- satellite navigation
- satellite navigator
- saturated vapour
- schedule
- schedule speed
- scissors crossover
- sand box
- sand drier
- sand nozzle
- satnav
- scanning rate
- scantling
- Schnabel car
- scale illumination
- scavenging
- scheduled service
- schnabel wagon
- scissors crossing
- scotch block
- scale gradation
- scale rate
- scheduled flight
- Schottel propeller
- screw
- screw spike
- scull
- sea carriage
- sea damage
- sea lane
- sea lock
- sea route
- sea trials
- sea voyage
- sea-damaged
- seaboard
- seagoing
- seagoing hovercraft
- seakeeping qualities
- seamark
- seasoned timber
- seat bracket
- seat cover
- seat frame
- seating capacity
- seawards
- second mate
- second train
- screw brake
- screw coupling
- sea area
- sea breeze
- sea buoy
- sea carrier
- sea clutter
- sea conditions
- sea fleet
- sea ice
- sea line
- sea pilot
- sea state
- sea trade
- sea transport
- seaborne trade
- seacock
- seagoing barge
- sealing tongs
- seasoned wood
- seat reservation