英文關鍵字
beacon
black
blue
boat
border
buoy
cardinal
channel
coast
cours
danger
east
equipment
fairway
float
guide
help
illustration
licence
marine
maritime
mark
marker
nautical
navigate
navigation
navigational
north
object
ocean
order
protection
road
safe
safety
sailing
sea
seascape
security
ship
sign
sks
striped
symbol
topmark
training
transportation
warning
water
yellow