- keel laying
- keel strake
- job title
- jolt
- jordan spreader
- journey time
- jumbo jet
- jury rudder
- keelson
- king plank
- kingston valve
- keel
- keel plate
- keep course
- Kevlar
- kinematic gauge
- king post
- king snipe
- labour book
- ladder
- ladder dredge
- lagging system
- L-band
- lacing cord
- ladder dredger
- lake
- land
- land container
- land wind
- landing
- landing area
- landing charge
- landing chart
- landing craft
- landing distance
- landing fee
- landing field
- landing gear
- landing lane
- landing light
- landing pier
- landing place
- landing pontoon
- landing procedure
- landing sequence
- landing skid
- landing speed
- landing stage
- landing strip
- lane
- lane switching
- lateral clearance
- lateral damper
- lateral system
- lateral turnout
- launch
- leading line
- lateral axis
- lay aback
- lead block
- leading block
- leaky
- lee
- lee shore
- lending
- lay ahull
- leading bogie
- leading edge
- leading light
- leading locomotive
- leading mark
- leeway angle
- level board
- levelling mark
- liability
- licence requirement
- licensing procedure
- lee helm
- leech
- length overall
- level
- level crossing
- level cruise
- level flight
- leveling mark
- levelling
- licence admendment
- life raft
- lifeboat
- lifeboat station
- lifebuoy
- lifeline
- lift center
- lift centre
- lift component
- lift distribution
- lift hoist
- lift off
- lift shaft
- lift sling