aid
anchored
background
beacon
belt
blue
bouy
buoy
calm
cell
channel
conduct
danger
fairway
float
harbor
help
isolated
lateral
life
lifebelt
lighting
limit
limitation
marine
maritime
mark
marker
navigable
navigate
navigation
navigational
orientation
pointed
port
portside
post
red
sea
security
ship
signal
solar
starboard
stationary
ton
vessel
warning
water
waterway